Water is a...? Mcqs

PPSC Past Papers

Latest MCQs

Water is a...?

(A) Compound
(B) Mixture

(C) Solution
(D) Element

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What percentage of earth’s water supply is fresh water___________...?

(A) 3%
(B) 5%

(C) 21%
(D) None of these

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In Fahrenheit scale the freezing point of water is ______...?

(A) 30°F
(B) 32°F

(C) 34°F
(D) 100°F

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Heavy mechanical complex use a large amount of water for_________...?

(A) Cooling
(B) Freezing

(C) Washing
(D) Mixing

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The fourth state of matter is...?

(A) Water
(B) Salts

(C) Vapours
(D) Plasma

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Material for rain-proof coats and tents owe their water proof properties to ________...?

(A) Surface tension
(B) Viscosity

(C) Specific gravity
(D) Elasticity

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Boiling point of pure water is __________...?

(A) 90’C
(B) 97’C

(C) 100’C
(D) None of these

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Water has high density and minimum volume at__________...?

(A) 0°C
(B) 4°C

(C) 100°C
(D) None of these

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Sound travel faster in solid as compare to gases because of ______...?

(A) Gas molecules are packed loosely
(B) Sound does not travel faster through a solid than a gas

(C) Solid molecules are packed tightly
(D) Gas molecules move faster

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A telescope is an instrument that gathers _______ from distant sources....?

(A) Sound
(B) Light

(C) Heat
(D) Water

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Nucleus is responsible for cell division because it contains nuclear material called...?

(A) Mitochondria
(B) Ribosomes

(C) Lysosomes
(D) Chromosomes

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The hormone that increases the rate of heart beat and blood pressure after shock in a person is___________...?

(A) Adrenalin
(B) Gastrin

(C) Thyroxin
(D) Pancreatic

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Lemon dissolution in water actually represents solute and solvent combination of ______...?

(A) Gas-liquid solution
(B) Liquid-liquid solution

(C) Solid-liquid solution
(D) Solid-solid solution

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If both the parents donate same factors of a character is called _____...?

(A) Homologous
(B) Heterologous

(C) Homozygous
(D) Heterozygous

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What is the percentage of salt water on earth surface...?

(A) 93%
(B) 95%

(C) 97%
(D) 76%

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Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________...?

(A) Conduction
(B) Convection

(C) Radiation
(D) Reflection

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What happens when you put sand, salt and sawdust in glass of water...?

(A) Salt has dissolved in water
(B) Sand sank to the bottom

(C) Sawdust floated on the top
(D) All of these

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The Analytical Chemistry deals with instruments and methods to ______ identify and quantify the matter....?

(A) Mix
(B) Separate

(C) Differentiate
(D) Manipulate

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The world's most consumed drink, after water is made from ____ plant....?

(A) Camellia sinensis
(B) Coffee arabica

(C) Punica granatum
(D) Mangifera indica

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When you put a drop of ink into water, why is the colour of ink moving in the glass...?

(A) Due to motion of molecules of water
(B) Due to motion of molecules of ink

(C) Due to gravity
(D) Due to light energy

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Which of the following is not a solid sublime material...?

(A) Glucose
(B) Sodium Chloride

(C) Iodine
(D) Camphor

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P-waves is a term associated with__________...?

(A) Earthquakes
(B) Oceans

(C) Wind
(D) Rivers

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A body of land that is surrounded by water on three sides is called________...?

(A) Strait
(B) Bay

(C) Peninsula
(D) Gulf

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Which of the followings planet can float on water...?

(A) Saturn
(B) Mars

(C) Venus
(D) None

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From among the following, which material is insoluble in water...?

(A) Sand
(B) Sugar

(C) Glucose
(D) Salt

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If the length of a heater coil is reduced by 10% of its original length, then Power consumed by heater will...?

(A) Increase over 10%
(B) Decrease by 10%

(C) Decrease by 0.5%
(D) Increase by 0.5%

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Places where the temperature of air is above freezing point of the water, the precipitation will be in the form of ________ ...?

(A) Hailstorms
(B) Thunders

(C) Rain
(D) Lightning

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Which of the following is the study of micro- organisms, mostly viruses and single called organisms such as bacteria, yeasts and protozoa ...?

(A) Microbiology
(B) Micrology

(C) Histopathology
(D) Tavelogy

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Sound travels_______ in solid materials then liquid...?

(A) Constant
(B) Slowest

(C) Fastest
(D) None of these

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An egg sinks in soft water but floats in a concentrated solution of salt because...?

(A) egg absorbs salt from the solution and expands
(B) albumin dissolves in salt solution and egg becomes lighter

(C) the density of salt solution exceeds the density of eggs
(D) water has high surface tension

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The amount of solid waste or concentration of gases other than oxygen increase in atmosphere is called...?

(A) Air pollution
(B) Ozone depletion

(C) Acid rain
(D) Greenhouse effect

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Naturally occurring enzyme used as a defense chemical by bacteria ______...?

(A) Defense protein
(B) Restriction enzyme

(C) Hydrolytic enzyme
(D) Ligase enzyme

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Water has been discovered on which potentially habitable super-Earth ...?

(A) K2-14d
(B) K2-15c

(C) K2-13a
(D) K2-18b

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The major ingredient of leather is__________________...?

(A) Collagen
(B) Polymer

(C) Nucleic acid
(D) None of these

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For seeing objects at the surface of water from a submarine under water, the instrument used is ________...?

(A) Periscope
(B) Telescope

(C) Kaleidoscope
(D) Spectroscope

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The most suitable thermometer for measuring boiling point of water is ...?

(A) Mercury Thermometer
(B) Liquid crystal thermometer

(C) Bimetallic thermometer
(D) Alcohol thermometer

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Permanent hardness of water can be removed by adding __________...?

(A) Chlorine
(B) Washing soda

(C) Bleaching powder
(D) None of these

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Name the animal which can live without water in its entire life...?

(A) Desert lizard
(B) Camel

(C) Kangaroo rat
(D) Cuttlefish

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Which is a water purification technology that uses a semipermeable membrane to remove ions, molecules and larger particles from drinking water...?

(A) Filtration
(B) Reverse Osmosis (RO)

(C) Sedimentation
(D) Distillation

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A region of space where matter has collapsed in on itself is called a...?

(A) White Dwarf
(B) Wormhole

(C) Black Hole
(D) Neutron Star

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Mammals is defined by which of the following characteristics...?

(A) Born alive
(B) Warm-blooded

(C) Milk feeding
(D) Fur/hair/skin & Spine

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Who is called father of antiseptic...?

(A) Alexander fleming
(B) Edward Jenner

(C) Lister
(D) Oswald Schmiedeberg

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Insects group of animals is characterized by...?

(A) Jointed legs & wings
(B) Segmented body & blood feeding

(C) Egg-laying & nectar feeding
(D) All of these

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Asteroids are made mostly of...?

(A) Rock, metal, ice and dust
(B) Rock and metal

(C) Metal and gas
(D) Metal, gas and rock

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The following are the methods to purify water except...?

(A) Filtration
(B) Distillation

(C) Crystallization
(D) Chlorination

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Characteristic odour of garlic is due to...?

(A) A fluorine compoune
(B) A sulphur compound

(C) A chlorine compound
(D) None of these

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What regulates the flow of water through the xylem...?

(A) Passive transport by the endodermis
(B) The number of companion cells in the phloem

(C) The evaporation of water from the leaves
(D) Active transport by sieve-tube membrane

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Which Planet is known as Watery Planet...?

(A) Earth
(B) Mars

(C) Jupiter
(D) Mercury

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Most soluble in water is:__________...?

(A) Camphor
(B) Sulphur

(C) Common salt
(D) Sugar

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A bacterium that lives in the intestines of human beings and animals is called...?

(A) Lactobacillus acidophilus
(B) Escherichia coli

(C) Staphylococcus aureus
(D) Bacillus subtilis

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Which of the following are lightest form of matter...?

(A) Solid
(B) Liquid

(C) Gases
(D) Plasma

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Which salts are excessively dissolved to make temporary hard water...?

(A) CaSO4 and CaCl2
(B) KNO3 and KOH

(C) CaCO3 and Ca(OH)2
(D) Ca(HCO3)2 and Mg(HCO3)2

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Less than one percent of Earth’s water is fresh water but Ocean contains what percent of the total water of planet Earth...?

(A) 99%
(B) 89%

(C) 77%
(D) 97%

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Which of the following phenomena occur when a small amount of acid is added to water...?

(A) Precipitation and Neutralization
(B) Evaporation and Condensation

(C) Sublimation and Deposition
(D) Dilution and Ionisation

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Which of the following remains suspended to form sand and water mixture...?

(A) Gas
(B) Plasma

(C) Liquid
(D) Solid

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Plant cell loses water and cytoplasm shrinks in a process called...?

(A) Osmosis
(B) Deplasmolysis

(C) Cytolysis
(D) Plasmolysis

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A fresh egg when placed in salt water will __________ ...?

(A) sink and go to the bottom
(B) sink but will not go to the bottom

(C) Float
(D) Burst

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Animal and Plant bodies contain ________ of water....?

(A) 75%
(B) 72%

(C) 70%
(D) 73%

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A _____ is used in submarines to monitor the surface of water....?

(A) Periscope
(B) Telescope

(C) Kaleidoscope
(D) Binoculars

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The process of converting wet waste to manure is___________...?

(A) Metabolism
(B) Conservation

(C) Incineration
(D) Composting

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Air, water, sun, land, rocks and light etc is/are an examples of...?

(A) Non-Living Components
(B) Abiotic Factors

(C) Biotic Factors
(D) Both A and B

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Percentage of water in an apple is__________...?

(A) 84%
(B) 90%

(C) 66%
(D) None of these

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About ______ of the body weight of a mammal is water....?

(A) 70%
(B) 75%

(C) 80%
(D) 90%

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Scalding with steam is more severe than scalding by boiling water because_______...?

(A) Steam can penetrate the skin
(B) Steam is at a higher temperature

(C) Steam contains more energy than boiling water
(D) Steam is at a higher pressure

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Freezing point of water at Fahrenheit Scale is...?

(A) 0 °F
(B) 212 °F

(C) 32 °F
(D) -32 °F

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Which is not a cause of water pollution...?

(A) Gases from household materials
(B) Sewage water from homes

(C) Untreated water from industries
(D) Water runoff from agriculture

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The most abundant element in sea water is...?

(A) Chlorine
(B) Sodium

(C) Sulfur
(D) Magnesium

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The potential of pure water is ____...?

(A) Zero
(B) 1

(C) 2
(D) 3

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Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ...?

(A) Zeolites
(B) Sulphonides

(C) Lime
(D) Nitrates

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Which of the following is not a magnetic material...?

(A) Steel
(B) Aluminum

(C) Cobalt
(D) None

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__________ is the atmospheric layer wherein the weather occurs....?

(A) Troposphere
(B) Stratosphere

(C) Mesosphere
(D) Thermosphere

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Water waves pass from deep into the shallow region and are then refracted. The characteristics of waves which will remain constant is _____...?

(A) Direction
(B) Frequency

(C) Speed
(D) Wavelength

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Disolved oxygen (DO) in water should be...?

(A) 400 to 800 ppm
(B) 4000 to 8000 ppm

(C) 0.4 to 0.5 ppm
(D) 4 to 5 ppm

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The gas heater gives us heat by __________...?

(A) Radiation
(B) Conduction

(C) Convection
(D) Environmental pressure

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How dark matter is detected...?

(A) Dark matter is detected through its absorption effects
(B) Dark matter is detected through its gravitational effects on visible matter

(C) Dark matter is detected through its absorption and gravitational effects
(D) Dark matter cannot be detected

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Sound travels about ___________times faster in water than in air....?

(A) 2
(B) 3

(C) 4
(D) 5

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In which state of matter, the particles have no regular pattern, have large empty spaces...?

(A) Solid
(B) Liquid

(C) Gas
(D) None

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Places where the temperature of air is below freezing point of the water, the precipitation will be in the form of __________ ...?

(A) Snow
(B) Lightning

(C) Hailstorms
(D) Thunders

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Hailey’s comet is visible after every_________...?

(A) 84 years
(B) 76 years

(C) 1000 years
(D) 365 years

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One of the following is a water soluble vitamin...?

(A) Vitamin A
(B) Vitamin D

(C) Vitamin K
(D) None

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What process takes place between particles of ink and particles of water when a drop of ink is added to water...?

(A) Osmosis
(B) Diffusion

(C) Sedimentation
(D) Decomposition

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When water vapours are cooled, energy will be released and gaseous state will convert into liquid water. This process is known as...?

(A) Evaporation
(B) Condensation

(C) Melting
(D) Freezing

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When sugar is added to water, its boiling point:__________...?

(A) Increase
(B) Decrease

(C) Remain unchanged
(D) None of the above

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How much percentage (%) of the Earth's Surface is covered with water...?

(A) 70%
(B) 60%

(C) 90%
(D) 75%

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Sugar dissolution in water, actually represents solute and solvent combination of _____...?

(A) Solid solid solution
(B) Liquid liquid solution

(C) Gas liquid solution
(D) Solid liquid solution

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The Quantity of matter present in an object is its ________...?

(A) Density
(B) Weight

(C) Mass
(D) None of these

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During the process, more water will also evaporate and convert to a gaseous state of water called the...?

(A) Water Liquid
(B) Water Solid

(C) Water Vapour
(D) Water Ice

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Which gland in the human body is called the master gland...?

(A) Pancreas
(B) Thyroid

(C) Pituitary
(D) Spleen

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Oil rises in a wick of oil lamp on account of a property of matter is called...?

(A) Angle of projection
(B) Determines

(C) Capillary action
(D) Refraction of light

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NASA scientists have recently detected water vapor on which Jupiter’s moon...?

(A) Callisto
(B) Europa

(C) lo
(D) None

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When parallel rays of light fall onto rough surface they are reflected in different directions and are scattered is called _____...?

(A) Regular Reflection
(B) Specular Reflection

(C) Diffused Reflection
(D) None

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Who is Considered as Father of Botany...?

(A) Aristotle
(B) Gregor Joghn Mandle

(C) Theophrastus
(D) Corlous Linnaeous

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Which water will freeze first...?

(A) Hot
(B) Cold

(C) Both
(D) None

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Which type of wastes are classified as Biodegradable waste...?

(A) Waste from plastic industries
(B) Vegetables waste from farms

(C) Wasted water from homes
(D) None

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Which of the following vitamins is synthesized in the body by intestinal bacteria_______...?

(A) Vitamins B1
(B) Vitamins B12

(C) Vitamins E
(D) Vitamins K

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Most asteroids orbit the sun in a region called the asteroid belt between...?

(A) Mars and Jupiter
(B) Jupiter and Saturn

(C) Mercury and Neptune
(D) Venus and Uranus

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A method of removing suspended sand particles and insoluble physical impurities from water is known as...?

(A) Sedimentation
(B) Filtration

(C) Distillation
(D) Chlorination

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Carbon dioxide dissolution in water, actually represents solute and solvent combination of _____...?

(A) Liquid-liquid solution
(B) Solid-liquid solution

(C) Gas-liquid solution
(D) Solid-solid solution

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Which vitamin is most soluble in water...?

(A) Vitamin D
(B) Vitamin B

(C) Vitamin C
(D) Both B and C

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The first and largest asteroid discovered was__________...?

(A) Pallas
(B) Juno

(C) Ceres
(D) Trojan

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What is the name of bacteria that causes Lyme Disease....?

(A) Escherichia Coli
(B) Staphylococus aureus

(C) Borrelia burgdorferi
(D) None of these

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Who is the Father of Genetics...?

(A) Gregor Mendel
(B) Alexendar

(C) Darewin
(D) Louis pasture

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Which solution contain more water...?

(A) 1.0M
(B) 0.75M

(C) 0.5M
(D) 0.25M

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The matter of our sun is in ________ state...?

(A) Liquid
(B) Gas

(C) Solid
(D) Plasma

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Which of the following is/are characteristics of amphibians...?

(A) Lives on/in land/water
(B) Cold-blooded

(C) Moist skin
(D) Both A and B

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Average salinity or ratio of salt as per kilogram of water of ocean is__________...?

(A) 35 grams
(B) 55 grams

(C) 32 grams
(D) 42 grams

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In Fahrenheit scale the boiling point of water is ______...?

(A) 208°F
(B) 210°F

(C) 212°F
(D) 214°F

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The study of the weather is called____________...?

(A) Meteorology
(B) Weatherology

(C) Ecology
(D) Geology

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The freezing point of water is the same as its...?

(A) Melting point
(B) Boiling point

(C) Evaporation point
(D) None

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Water covers __________ of the Earth’s surface...?

(A) 61%
(B) 67%

(C) 71%
(D) 76%

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Freezing point of water is__________...?

(A) 0°C
(B) -2°C

(C) -4°C
(D) None of above

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The Percentage of Water used for Drinking in the world is...?

(A) 1%
(B) 10%

(C) 3%
(D) 5%

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A group of stars in the sky that, when viewed from Earth, create an outline of some recognizable shape or pattern is called ___...?

(A) Constellation
(B) Nebula

(C) Asterism
(D) Galaxy

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The nucleus contains a hereditary material called ____...?

(A) Mitochondria
(B) Chromosomes

(C) Ribosomes
(D) Lysosomes

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Speed of sound in water at 20 °C is___________...?

(A) 1450 m/s
(B) 1474 m/s

(C) 1498 m/s
(D) 1500+ m/s

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Which of the following is the purpose of connecting a battery in an electric circuit...?

(A) To maintain resistance across the conductor
(B) To vary resistance across the conductors

(C) To maintain constant potential difference across the conductor
(D) To maintain varying potential difference across the conductor

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Which of the following pollutants in water causes “Minamata disease...?

(A) Methyl Mercury
(B) Lead

(C) Salmonella
(D) Perchlorate

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In a solution, when water is used as a solvent that solution is called...?

(A) Saturated Solution
(B) Aqueous Solution

(C) Unsaturated Solution
(D) Concentrated Solution

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Sea water (Salt water) freezes at ...?

(A) Same temperature as fresh water.
(B) Slightly higher temperatures than fresh water.

(C) Slightly higher temperature than fresh water.
(D) Sea water does not freeze

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Which is not a biodegradable waste...?

(A) Vegetable peeling
(B) Plastic bottles

(C) Paper
(D) None

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Which stone floats on water...?

(A) Pumice stone
(B) Lime stone

(C) Basalt stone
(D) Quartzite stone

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Which one of the following forms weak electrolyte solution with water...?

(A) CH₃COOH
(B) H₂SO₄

(C) NaCl
(D) None of these

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Element extracted from Sea water...?

(A) Beryllium
(B) Magnesium

(C) Aluminium
(D) None of These

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Louder sound is characterized by which of the following...?

(A) High Frequency
(B) Low Frequency

(C) High Amplitude
(D) Low Amplitude

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Milk contains water...?

(A) 70%
(B) 75%

(C) 87%
(D) 90%

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Techniques for manipulation of gene to achieve desirable characters are called...?

(A) Biotechnology
(B) Biochemistry

(C) Genomics
(D) Gene Therapy

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Water vapor is ______________...?

(A) A gas
(B) A cloud droplet

(C) A rain drop
(D) A snowflake

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Which of the following is not a characteristic of a Dicot Plants...?

(A) Its leaves have parallel venation
(B) Its leaves have netted venation

(C) Its seed consist of two cotyledon
(D) Its flowers have four or multiple of four floral leaves

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The largest artery in human body_______...?

(A) Subclavian artery
(B) Aorta

(C) Brachial artery
(D) None of these

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In blood, the percentage of water is___________...?

(A) 75%
(B) 85%

(C) 90%
(D) 95%

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The light rays used for eliminating bacteria...?

(A) X-rays
(B) infrared rays

(C) microwave radiation
(D) ultra-violet radiation

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The process of removing water in the form of vapour in the form of leaves is called...?

(A) Nutrition
(B) respiration

(C) perspiration
(D) transpiration

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The cow’s milk contains how much amount of water in terms of percentage...?

(A) 60%
(B) 65%

(C) 72%
(D) 80%

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Water has maximum density at____________...?

(A) 0°C
(B) 4°C

(C) 4° K
(D) 4.8°C

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On heating the particles in the ice cubes will gain energy, move faster and change to liquid water. This is called...?

(A) Freezing
(B) Melting

(C) Boiling
(D) Condensation

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Which of the following is not a water soluble vitamin...?

(A) Tocopherol
(B) Pyridoxine

(C) Pantothenic acid
(D) Niacin

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Why the needle of iron swims on water surface when it is kept gently ...?

(A) It will remain under the water, when it will displace more water than its weight
(B) the density of needle is less than that of water

(C) due to surface tension
(D) due to its shape

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Salt dissolution in water, actually represents solute and solvent combination of _____...?

(A) Solid liquid solution
(B) Solid solid solution

(C) Liquid liquid solution
(D) Gas liquid solution

Comments
Latest MCQs

Plastic is made of materials including _____...?

(A) Recycled Plastic
(B) Rocks & Sand

(C) Coal, Oil, Natural Gas
(D) None of the these

Comments
Latest MCQs

Water percentage in plasma is _____...?

(A) 80%
(B) 90%

(C) 60%
(D) 70%

Comments
Latest MCQs

Detergents dissolved in water help in cleaning clothes by_________...?

(A) Increasing the temperature of water
(B) Reacting chemically with dirt

(C) Reducing the surface tension of water
(D) Dissolving dirt

Comments
Latest MCQs

What makes dark matter invisible to telescope...?

(A) Dark matter interacts with electromagnetic force for very short duration
(B) Dark matter does not interact with electrostatic force

(C) Dark matter does not interact with electromagnetic force
(D) None of the above

Comments
Latest MCQs

Which of the following processes is used in water purification...?

(A) Reverse Osmosis
(B) Osmosis

(C) Cytolysis
(D) Turgor Pressure

Comments
Latest MCQs

Which of the following floats on water to form sawdust and water mixture...?

(A) Solid
(B) Liquid

(C) Gas
(D) None

Comments
Latest MCQs

At which temperature does bacteria die...?

(A) 102F
(B) 106F

(C) 149F
(D) None of These

Comments
Latest MCQs

Dielectric constant of water is...?

(A) 60
(B) 70

(C) 80
(D) None of these

Comments
Latest MCQs

Which of the following organisms releases molecular oxygen into water...?

(A) E.coli
(B) Phytoplankton

(C) Amoeba
(D) Salmonella

Comments
Latest MCQs

Which is used to remove dissolved physical and chemical impurities from water is called ____...?

(A) Distillation
(B) Chlorination

(C) Filtration
(D) Sedimentation

Comments
Latest MCQs

Swimmers make their bodies streamlined to ________ friction under water....?

(A) Increase
(B) Reduce

(C) Maintain
(D) Ignore

Comments
Latest MCQs

Running water is required for breeding of ______...?

(A) Grass crap
(B) Silver fish

(C) Common crap
(D) Tilapia

Comments
Latest MCQs

A term biotype means ___________...?

(A) all individuals having same phenotype
(B) all individuals having same genotype

(C) all individual with different phenotype
(D) all individuals with different genotype

Comments
Latest MCQs

The quantity of matter in an object is its ________...?

(A) Force
(B) Mass

(C) Weight
(D) None of these

Comments
Latest MCQs

A thick cloud of water droplets on the earth’s surface is called...?

(A) Dew
(B) Fog

(C) Frost
(D) Rain

Comments
Latest MCQs

The molecular mass of Water molecule is __________...?

(A) 16amu
(B) 17amu

(C) 18amu
(D) 20amu

Comments
Latest MCQs

Earthquake waves travel faster in __________...?

(A) Water
(B) Flexibl rock

(C) Air
(D) Soil

Comments
Latest MCQs

What pigment is responsible for the red color inside a watermelon...?

(A) Chlorophyll
(B) Beta-carotene

(C) Lycopene
(D) Anthocyanin

Comments
Latest MCQs

_______ bacterial disease affects Eye...?

(A) Trachoma
(B) Rickets

(C) Osteoporosis
(D) Gum disease

Comments
Latest MCQs

Density of Water is_________...?

(A) 897 kg/m³
(B) 997 kg/m³

(C) 1000 kg/m³
(D) 1025 kg/m³

Comments
Latest MCQs

Father of Homeopathy is__________...?

(A) Samuel Hahnemann
(B) Robert Dover

(C) Hakeem Suleman
(D) Dr Anwaar Khan

Comments
Latest MCQs

A solid is a state of matter _____...?

(A) Definite volume and indefinite shape
(B) Indefinite volume and definite shape

(C) Definite volume and definite shape
(D) Indefinite volume and indefinite shape

Comments
Latest MCQs

The process of splitting water molecules in the presence of light energy is called_________...?

(A) Electrolysis
(B) Photolysis

(C) Radiolysis
(D) Thermolysis

Comments
Latest MCQs

Which of the following material is more elastic...?

(A) Rubber
(B) Glass

(C) Steel
(D) Wood

Comments
Latest MCQs

Water is a universal solvent for what reactions...?

(A) Chemical
(B) Biochemical

(C) Physical
(D) Nuclear

Comments
Latest MCQs

Living organisms which derive their food from dead and decaying organic materials called...?

(A) Saprotrophs
(B) Parasites

(C) Predators
(D) Producers

Comments
Latest MCQs

The additional circular small piece of DNA in bacterial cell is called ____...?

(A) Plasmids
(B) Replica

(C) Template
(D) Clone

Comments
Latest MCQs

The products of the reaction between carbon dioxide and water are ______...?

(A) Glucose (C6H12O6) and Nitrogen (N2)
(B) Glucose (C6H12O6) and Oxygen (O2)

(C) Starch (C6H10O5) and Water (H2O)
(D) Cellulose (C6H10O5) and Carbon Monoxide (CO)

Comments
Latest MCQs

The materials required for respiration are ______...?

(A) Glucose (C6H12O6) and Oxygen (O2)
(B) Glucose (C6H12O6) and Water (H2O)

(C) Carbon Dioxide (CO2) and Water (H2O)
(D) Oxygen (O2) and Light Energy

Comments
Latest MCQs

Organisms that eat all the dead and waste products and returning useful elements to soil and environment are known as...?

(A) Decomposers
(B) Producers

(C) Consumers
(D) None

Comments
Latest MCQs

The container use to grow bacteria on large scale are called...?

(A) Chillers
(B) Sterilizers

(C) Fermenters
(D) Ferments

Comments
Latest MCQs

Which gas is used in preparation of Soda water...?

(A) Ammonia
(B) Hydrogen

(C) Nitrogen
(D) Carbon Dioxide

Comments
Latest MCQs

What is the percentage of water present in our brain...?

(A) 85%
(B) 95%

(C) 97%
(D) 73%

Comments
Latest MCQs

The taste of water is ______...?

(A) Sour
(B) Bitter

(C) Sweet
(D) Tasteless

Comments
Latest MCQs

State of matter that has fixed shape and fixed volume is called...?

(A) Solid
(B) Liquid

(C) Gas
(D) None

Comments
Latest MCQs

In bacteria mesosomes take the place of which one of the following...?

(A) Ribosome
(B) Mitochondria

(C) Golgi bodies
(D) None of these

Comments
Latest MCQs

The volume of air remaining in the lungs even after forcible expiration is:...?

(A) total volume
(B) tidal volume

(C) residual volume
(D) none of the above

Comments
Latest MCQs

What is the number of known crystalline phases of water ________...?

(A) 4
(B) 8

(C) 17
(D) 18

Comments
Latest MCQs

Who is considered the “father of psychoanalysis...?

(A) Sigmund Frend
(B) Galileo

(C) Aristotle
(D) Fabrica

Comments
Latest MCQs

Who invented the first battery...?

(A) Alessandro volta
(B) Tim Berner

(C) Rob Stothard
(D) Georges Leclanche

Comments
Latest MCQs

Which of the following is/are the characteristics of reptiles...?

(A) Dry scaly skin
(B) Cold-blooded

(C) Lay eggs on land
(D) Lives in/on water/land

Comments
Latest MCQs

If we dissolve sand into the water, then the mixture is said to be _______...?

(A) Solution
(B) Suspension

(C) Colloids
(D) Concentrated solution

Comments
Latest MCQs

Water vapour beyond the dew point result in_________...?

(A) Precipitation
(B) Hailstorm

(C) Condensation
(D) Formation of ice

Comments
Latest MCQs

In the Centigrade scale, the freezing point of water is _______ and the boiling point of water is ________...?

(A) 0°C, 50°C
(B) 10°C, 100°C

(C) 0°C, 100°C
(D) 5°C, 90°C

Comments
Latest MCQs

State of matter that hast fixed volume but not fixed shape is called...?

(A) Solid
(B) Gas

(C) Liquid
(D) None

Comments
Latest MCQs

When the angle of refraction is 90° and the refractive index for water is 1. 33, the critical angle is ______...?

(A) 48.8°
(B) 50.0°

(C) 49.1°
(D) 51.0°

Comments
Latest MCQs

Chemical formula for Water is _______ ...?

(A) NaAlO2
(B) H2O

(C) Al2O3
(D) CaSiO3

Comments
Latest MCQs

Solid wastes that are not easily decomposed by decomposers are called...?

(A) Biodegradable
(B) Non-biodegradable

(C) Both A and B
(D) None

Comments
Latest MCQs

Water vapour turns into clouds in the atmosphere when:...?

(A) It rains
(B) The temperature rise

(C) Dew point is reached
(D) Evaporation takes place

Comments
Latest MCQs

Organisms that eat all the dead and waste products of producers and consumers are called...?

(A) Producers
(B) Consumers

(C) Decomposers
(D) None

Comments
Latest MCQs

Which gas can turn lime water milky...?

(A) O2
(B) NO2

(C) CO2
(D) N2

Comments
Latest MCQs

Removal of extra liquid water is _____...?

(A) Exudation
(B) Guttation

(C) Respiration
(D) Transpiration

Comments
Latest MCQs

Which scientist is known as modern father of Astronomy ...?

(A) Einstein
(B) Newton

(C) Copernicus
(D) Archimedes

Comments
Latest MCQs

The boiling point of water on a centigrade scale is...?

(A) 80°C
(B) 90°C

(C) 100°C
(D) 10°C

Comments
Latest MCQs

Who is the known as the father of taxonomy...?

(A) Aristotle
(B) Fransco Redi

(C) Carolus Linnaeus
(D) Rachel Carson

Comments
Latest MCQs

All of these are benefits of bacteria except ______...?

(A) Decomposition
(B) Oxygen Production

(C) Nitrogen Fixation
(D) None of these

Comments
Latest MCQs

Which of the following is not a characteristic of a Monocot Plants...?

(A) Its leaves have parallel venation
(B) Its seed consist of one cotyledon

(C) Its flowers have three or multiple of three floral leaves
(D) Its flowers have four or multiple of four floral leaves

Comments
Latest MCQs

Which of the following is not a characteristic of a wave...?

(A) An amplitude
(B) Period

(C) Mass
(D) Velocity

Comments
Latest MCQs

How much percentage of water on the earth is saltwater...?

(A) 90%
(B) 95%

(C) 98.5%
(D) 97.5%

Comments
Latest MCQs

The order of speed of the sound in different mediums from faster to slowest is ______...?

(A) Gas → Liquid → Solid
(B) Liquid → Solid → Gas

(C) Solid → Liquid → Gas
(D) Gas → Solid → Liquid

Comments
Latest MCQs

Which of the following is not a waterborne disease...?

(A) Cholera
(B) Amoebiasis

(C) Typhoid
(D) Influenza

Comments
Latest MCQs

What happens when water solidifies as ice on cooling from 4°C to 0°C...?

(A) Its volume increases and density decreases
(B) Its volume increases and density increases

(C) Its volume decreases and density decreases
(D) Its volume decreases and density increases

Comments
Latest MCQs

A change that alters the composition of a substances is known as ____...?

(A) Physical Change
(B) Nuclear Change

(C) Chemical Change
(D) Biological Change

Comments
Latest MCQs

A liquid is a state of matter _______...?

(A) Definite volume and definite shape
(B) Indefinite volume and definite shape

(C) Definite volume and indefinite shape
(D) Indefinite volume and indefinite shape

Comments
Latest MCQs

Which dissolves in water to form salt and water mixture...?

(A) Gas
(B) Liquid

(C) Solid
(D) None

Comments
Latest MCQs

Movement of water molecules from the area of higher water potential to the area of lower water potential called...?

(A) Diffusion
(B) Osmosis

(C) Active transport
(D) Water potential

Comments
Latest MCQs

Which of the following flower is called Queen of Water...?

(A) Rose
(B) Lilly

(C) Rafflesia
(D) Tulip

Comments
Latest MCQs

Which of the following is/are characteristics of fish...?

(A) Lives in water & cold-blooded
(B) Fins and scales

(C) Lay eggs in water
(D) Breathes with gills

Comments
Latest MCQs

Water soluble vitamins are released by__________...?

(A) Sweat
(B) Tears

(C) Injections
(D) Urine

Comments
Latest MCQs

In the bacterial cell, the DNA is found floating in the ____...?

(A) Mitochondria
(B) Nucleus

(C) Cell Wall
(D) Cytoplasm

Comments
Latest MCQs

A narrow beam of white light passes from air into the glass and is refracted. The wave characteristic remains unchanged in its ______...?

(A) Direction
(B) Speed

(C) Frequency
(D) Wavelength

Comments
Latest MCQs

What are considered the building blocks of matter...?

(A) Molecules
(B) Protons

(C) Elements
(D) Atoms

Comments
Latest MCQs

An iceberg is floating in sea. How much of its mass will remain above the surface of water...?

(A) One tenth
(B) One fifth

(C) One fourth
(D) One third

Comments
Latest MCQs

Which of the following is used in water purification...?

(A) Reverse Osmosis
(B) Osmosis

(C) Cytolysis
(D) Turgor Pressure

Comments
Latest MCQs

In a typical H-R diagram, stars are graphed by these two characteristics:...?

(A) Temperature and luminosity
(B) Luminosity and distance

(C) Distance and temperature
(D) Size and distance

Comments
Latest MCQs

All are characters of enzymes except...?

(A) Enzyme speed up a biochemical reaction
(B) Enzymes are sensitive to minor change in pH

(C) Enzyme activity enhanced by inhibitors
(D) Enzyme portion where substrate attach called active site

Comments
Latest MCQs

What is a distinguishing character of arachnids...?

(A) 6 legs
(B) 8 legs

(C) Antennae
(D) Wings

Comments
Latest MCQs

Substance whose atoms can be split are known as __________ materials....?

(A) Fusionable
(B) Fissionable

(C) Combustible
(D) None of these

Comments
Latest MCQs

Water at 4 degrees centigrade has...?

(A) Minimum density
(B) Maximum density

(C) No density
(D) None of these

Comments
Latest MCQs

Which one of the following tablets are used for water purification...?

(A) Aspirin
(B) Antibiotic

(C) Vitamin C
(D) Halazone

Comments
Latest MCQs

Cobalt is a material which is ...?

(A) Strongly attracted by a magnet
(B) Not attracted by a magnet

(C) not a magnet
(D) Weakly attracted by a magnet

Comments
Latest MCQs

Heating element of an electric heater is made up of___________...?

(A) Tungsten
(B) Graphite

(C) Chromium
(D) Nichrome

Comments
Latest MCQs

Which of the following is a ferromagnetic material ...?

(A) Tungsten
(B) Aluminium

(C) Copper
(D) Nickel

Comments
Latest MCQs

The temperature at which water boils depends mainly on ____________...?

(A) Air temperature
(B) Relative humidity

(C) Air pressure
(D) Air density

Comments
Latest MCQs

Sounds travel faster through solids than _______...?

(A) Liquid
(B) Gases

(C) Solids
(D) Both A and B

Comments
Latest MCQs

Lead ball falls through water more slowly than through air because __________...?

(A) The value of ‘g’ is less in water
(B) Density of air is less than that of water

(C) Of the viscous force in water
(D) Of The surface tension of water

Comments
Latest MCQs

Water soluble Vitamins are _________...?

(A) A & D vitamins
(B) B & C vitamins

(C) A & K vitamins
(D) B & K vitamins

Comments
Latest MCQs

Which is the purest form of water...?

(A) Rain water
(B) Heavy water

(C) Tap water
(D) None of these

Comments
Latest MCQs

Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to____________...?

(A) hydrogen bonding
(B) irregular shape of the molecules

(C) irregular shape of the molecules and strong inter-molecular forces
(D) greater molecular size

Comments
Latest MCQs

The soil maturity color of northeastern areas is ______...?

(A) Grey
(B) Reddish

(C) Dark Brown
(D) None of these

Comments
Latest MCQs

The density of water is __________...?

(A) 1 g/cm3
(B) 1.5 g/cm3

(C) 2 g/cm3
(D) none of these

Comments
Latest MCQs

Almost identical eclipses occur after 18 years and 11 days. This cycle is known as__________...?

(A) Partial Eclipse cycle
(B) Total Eclipse Cycle

(C) Saros Cycle
(D) None of the above

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Latest MCQs

Rate of evaporation of petrol is greater than that of water at room temperature because:...?

(A) petrol molecules do not have any hydrogen bond
(B) petrol is an organic compound

(C) water molecules have small size
(D) petrol molecules have greater size

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Latest MCQs

An undesirable change in the characteristics of air, water and land environment that is harmful to humans and living things is known as...?

(A) Pollutant
(B) Pollution

(C) Climate Change
(D) Global Warning

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Latest MCQs

The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids....?

(A) Mars
(B) Saturn

(C) Uranus
(D) Jupiter

Comments
Latest MCQs

The water has minimum density at _____...?

(A) O°C
(B) 2°C

(C) 3°C
(D) 4°C

Comments
Latest MCQs

Water is 50 times more viscous than ____________ ...?

(A) Oil
(B) Alcohol

(C) Gases
(D) Solid

Comments
Latest MCQs

Triple point of water is _________...?

(A) 271 K
(B) 272.2 K

(C) 273.16 K
(D) None of these

Comments
Latest MCQs

Which planet of our solar system is name after a female...?

(A) Uranus
(B) Saturn

(C) Venus
(D) Mercury

Comments
Latest MCQs

Splitting of water in presence of light called...?

(A) Hydrolysis
(B) Glycolysis

(C) Photolysis
(D) None of these

Comments
Latest MCQs

The variety of coal in which the deposit contains recognizable traces of the original plant material is____________...?

(A) bitumen
(B) anthracite

(C) lignite
(D) peat

Comments
Latest MCQs

All matter is made of ___________...?

(A) Air
(B) Water

(C) Vibrations
(D) Atoms

Comments
Latest MCQs

In Fahrenheit scale the freezing point of water is ______ and boiling point of water is _______ ...?

(A) 32°F, 212°F
(B) 212°F, 32°F

(C) 35°F, 210°F
(D) 210°F, 35°F

Comments
Latest MCQs

Which one of the following is biodegradable material...?

(A) Plastic
(B) Styrofoam

(C) Glass
(D) Fruits

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Latest MCQs

In plants, water and minerals are transported from roots to the leaves by ____...?

(A) Phloem
(B) Xylem

(C) Stomata
(D) Cambium

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Latest MCQs

Which mineral plays an important role in the distribution of water in the body...?

(A) Calcium
(B) Magnesium

(C) Iodine
(D) Sodium

Comments
Latest MCQs

If pH value is greater than 7, then solution is ______...?

(A) Acidic
(B) Basic

(C) Amphoteric
(D) Neutral

Comments
Latest MCQs

There are many different types of frozen water on Earth. Collectively, they are known as the: ___________...?

(A) Hydrosphere
(B) Cryosphere

(C) Frigid Zone
(D) Biosphere

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About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is...?

(A) Oxygen
(B) Cabon Dioxide

(C) Silicon
(D) Clay

Comments
Latest MCQs

The gas used in a refrigerator to cool water is___________...?

(A) Nitrogen
(B) Carbon dioxide

(C) Methane
(D) Tetrafluoroethane

Comments
Latest MCQs

Water present in watermelon...?

(A) 92%
(B) 93%

(C) 94%
(D) 95%

Comments
Latest MCQs

Solid wastes that are easily decompose by decomposers are called...?

(A) Biodegradable
(B) Non-biodegradable

(C) Both A and B
(D) None

Comments
Latest MCQs

Law of conservation of momentum defines that the total momentum of a system of two bodies before and after collision ______...?

(A) Remains constant
(B) Retains more momentum

(C) Losses some momentum
(D) None of the above is true

Comments
Latest MCQs

The way by which gene transmits characters from parents to offspring is _____...?

(A) Genetics
(B) Inheritance

(C) Heredity
(D) Allele

Comments
Latest MCQs

The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water....?

(A) 1 gram
(B) 10 grams

(C) 1 kg
(D) 10 kg

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Latest MCQs

Loss of internal water of plant in the form of vapours from aerial parts of plants is called...?

(A) Evaporation
(B) Respiration

(C) Transpiration
(D) Photosynthesis

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Latest MCQs

We could destroy the Dengue Mosquito by introducing a special Mosquito Eating ______in the water bodies....?

(A) Fish
(B) Meat

(C) Chicken
(D) None

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Latest MCQs

For the generation of biogas, the materials commonly used are__________...?

(A) Animal wastes
(B) Forest residues

(C) Aquatic plants
(D) None of these

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Latest MCQs

Which type of wastes are classified as Non-biodegradable waste...?

(A) Waste from the plastic industry
(B) Vegetable waste from farms

(C) Kitchen waste from home
(D) None

Comments
Latest MCQs

Which one of the following is non-biodegradable material...?

(A) Plastic
(B) Manure

(C) Wood
(D) Cotton

Comments
Latest MCQs

Which of the following are non-biodegradable materials ______...?

(A) Dead Animals
(B) Plastics

(C) Bread
(D) None of these

Comments
Latest MCQs

Permanent hardness of water is due to the presence of __________...?

(A) Sodium bicarbonate
(B) Calcium sulfate

(C) Calcium bicarbonate
(D) None of these

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Latest MCQs

Percentage of water in a tomato is__________...?

(A) 94%
(B) 90%

(C) 47%
(D) None of these

Comments
Latest MCQs

The beautiful color patterns exhibited by a peacock in its tail feathers are due to ...?

(A) Selective absorption of light
(B) Selective re ection of light

(C) Sinterference of light
(D) Natural colour pattern of feathers

Comments
Latest MCQs

A burning candle is an example of ______ state of matter....?

(A) Gas
(B) Liquid

(C) Solid
(D) All three

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Latest MCQs

Water is a highly effective coolant for a car engine because _________...?

(A) Water is good conductor of heat
(B) Water has very high specific heat capacity

(C) Water boils at a comparatively high temperature
(D) Evaporation of water produces lot of cooling

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Latest MCQs

A gas is a state of matter _______...?

(A) Definite volume and definite shape
(B) Definite volume and indefinite shape

(C) Indefinite volume and indefinite shape
(D) Indefinite volume and definite shape

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Latest MCQs

A _______ is an object with at least one slanting side ending in a sharp edge, which cuts material apart....?

(A) Pulley
(B) Inclined Plane

(C) Lever
(D) Wedge

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Latest MCQs

Which metal is extracted from sea water...?

(A) Potassium
(B) Magnesium

(C) Aluminum
(D) None of these

Comments
Latest MCQs

What percentage of plasma is composed of water...?

(A) 70%
(B) 80%

(C) 90%
(D) 92%

Comments
Latest MCQs

The camel has a special water storage space in its...?

(A) Stomach
(B) Hump

(C) Liver
(D) None

Comments
Latest MCQs

The chemical material of a chromosome is called _____...?

(A) Chromatin
(B) Chromeres

(C) Chromonema
(D) Chromatid

Comments
Latest MCQs

Matter exists in______ states....?

(A) One
(B) Three

(C) Five
(D) None of these

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Latest MCQs

“Father of Optics” is the title given to__________...?

(A) Ibn-al-Haitham
(B) Ibn-e-Sina

(C) Al-Kandi
(D) Al-Biruni

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Latest MCQs

Where do most of Asteroids lie...?

(A) In asteroid belt between the orbits of Mars and Jupiter
(B) In asteroid belt between the orbits of Mars and Venus

(C) In asteroid belt between the orbits of Jupiter and Venus
(D) Everywhere in the sky

Comments
Latest MCQs

State of matter that has no fixed shape and no fixed volume is called...?

(A) Liquid
(B) Solid

(C) Gas
(D) None

Comments
Latest MCQs

Rainbow is seen after rain because of hanging molecules of water which act as __________...?

(A) Lens
(B) Prism

(C) Mirror
(D) Slabs

Comments
Latest MCQs

How much percentage of water on the earth is freshwater...?

(A) 2.5%
(B) 3.5%

(C) 4.5%
(D) 5.5%

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The evaporation of water from aerial parts of the plant especially through leaves is called...?

(A) Translocation
(B) Photosynthesis

(C) Respiration
(D) Transpiration

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The primary function of the feathers in birds is to _________...?

(A) Provide insulation for preserving body heat
(B) Provide striking surface to the wings for flying

(C) Make the body surface waterproof
(D) impart coloration for species as well as sex recognition

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Permanent hardness of water may be removed by the addition of___________...?

(A) Sodium Carbonate
(B) Alum

(C) Potassium Permanganate
(D) Lime

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The carboxylate end of the soap molecule that is attracted to water is called...?

(A) Hydrophobic end
(B) End point

(C) Hydrophilic end
(D) None

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Butter paper is _________ material because it scatters light....?

(A) Transparent
(B) Translucent

(C) Opaque
(D) None

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Which animal can live longest without water...?

(A) Elephant
(B) Cat

(C) Rat
(D) Camel

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Surfactants reduce the ______ of water....?

(A) Viscosity
(B) Surface tension

(C) Boiling point
(D) Melting Point

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pH value of water is _________...?

(A) 5
(B) 5-6

(C) 8.7-10.5
(D) 6.5-8.5

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Transportation of water takes place through continuous tubes in roots, stem and leaves are called as...?

(A) Xylem
(B) Phloem

(C) Stomata
(D) Cambium

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The amount of space a material object occupies is called its...?

(A) Volume
(B) Matter

(C) Mass
(D) Force

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The permanent hardness of water is due to presence ______...?

(A) MgSO4
(B) Mg(HCO3)₂

(C) CA(HCO3)2
(D) All of these

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Energy possessed by water in a dam is ...?

(A) Electrical energy
(B) Mechanical energy

(C) Kinetic energy
(D) Potential energy

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Which pigment is responsible for the red color inside a watermelon...?

(A) Lycopene
(B) Beta Carotene

(C) Alpha Carotene
(D) All of these

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Which method can be used to get drinking water from sea water...?

(A) Filtration
(B) Sublimation

(C) Crystallization
(D) Distillation

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For water purification, we use...?

(A) Chlorine
(B) Bromine

(C) Plants
(D) Young man

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Ten identical steel balls, each with a mass of 27 g, are immersed in a measuring cylinder initially containing a certain volume of water. The water level rises by 50 cm³ after immersing the balls. What is the density of the steel...?

(A) 0.90 gm/cm^3
(B) 8.1 gm/cm^3

(C) 9.0 gm/cm^3
(D) 13.5 gm/cm^3

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Water enters the root hair by ____...?

(A) Diffusion
(B) Osmosis

(C) Active Transport
(D) Transpiration

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Underground water and the water on the earth’s surface is called ...?

(A) Mezosphere
(B) Ionosphere

(C) Hydrosphere
(D) None of these

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Water is a good solvent of ionic salts because:...?

(A) It has a high specific heat
(B) It has no colour

(C) It has a high dipole moment
(D) None of these

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Materials for rain-proof coats and tents owe their water proof properties to________...?

(A) Surface tension
(B) Viscosity

(C) Specific gravity
(D) Elasticity

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