Which of the following is the lightest substance...?

PPSC Past Papers

Latest MCQs

Which of the following is the lightest substance...?

(A) Uranium

(B) Hydrogen

(C) Oxygen

(D) Nitrogen

Comments

Latest MCQs

Which of the following is the hardest substance...?

(A) Copper

(B) Diamond

(C) Iron

(D) Silicon

Comments

Latest MCQs

Which substance has a pH value closest to neutral...?

(A) Ammonia

(B) Blood

(C) Milk

(D) Organic juice

Comments

Latest MCQs

What is the substance that causes undesirable change to the environment...?

(A) Climate Change

(B) Pollution

(C) Pollutant

(D) None

Comments

Latest MCQs

The soapy touching property of substance are known as ____...?

(A) Acids

(B) Bases

(C) Salts

(D) Oxides

Comments

Latest MCQs

The simplest kind of matter which cannot be further split up into simpler substances by chemical reactions is called...?

(A) Compound

(B) Atom

(C) Molecule

(D) Element

Comments

Latest MCQs

Which of the following is a substance...?

(A) Sea water

(B) Brass

(C) Tape water

(D) Graphite

Comments

Latest MCQs

Which cell component is a jelly-like substance that contains many chemicals and facilitates chemical reactions...?

(A) Nucleus

(B) Cell Wall

(C) Cytoplasm

(D) Cell Membrane

Comments

Latest MCQs

The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called ___________...?

(A) Aphelion

(B) Perihelion

(C) Perigee

(D) Apogee

Comments

Latest MCQs

Shortest distance between two points is called...?

(A) Distance

(B) Speed

(C) Displacement

(D) Velocity

Comments

Latest MCQs

which is the second brightest star in the Universe...?

(A) Betelgeuse

(B) Vega

(C) Canopus

(D) None of these

Comments

Latest MCQs

What is the name of the substance which gets dissolved...?

(A) Solute

(B) Solvent

(C) Solution

(D) Mixture

Comments

Latest MCQs

The ice giants are mostly made of ‘volatile’ substances such as...?

(A) Water, mercury and methane

(B) Water, ammonia and mercury

(C) Water, plasma and methane

(D) Water, ammonia and methane

Comments

Latest MCQs

Chlorophyll is a green substance that is present in _____...?

(A) Mitochondria

(B) Nucleus

(C) Chloroplast

(D) Golgi Apparatus

Comments

Latest MCQs

Among the following, which substance is not a compound...?

(A) H2O

(B) Mg

(C) CO2

(D) NaCl

Comments

Latest MCQs

A thin partially permeable layer around the animal cell which control the substances that enter and exist is called...?

(A) Cell Wall

(B) Cell Membrane

(C) Cytoplasm

(D) Nucleus

Comments

Latest MCQs

The most densest substance on the Earth is __________....?

(A) Platinum

(B) Copper

(C) Steel

(D) Osmium

Comments

Latest MCQs

A single compound breaks down to form two or more simpler substances are called...?

(A) Combination Reaction

(B) Decomposition Reaction

(C) Neutralization Reaction

(D) Addition Reaction

Comments

Latest MCQs

Which of the following occurs when light passes through a substance unchanged...?

(A) Transmission

(B) Reflection

(C) Absorption

(D) Refraction

Comments

Latest MCQs

When a substance is dissolved in a liquid and no new substance is formed. What will these substances are called...?

(A) Solute

(B) Solution

(C) Compound

(D) None

Comments

Latest MCQs

The solubility of a solute substance increases _____...?

(A) As the liquid cools down

(B) As the liquid becomes more concentrated

(C) As the liquid heats up

(D) As the liquid becomes more diluted

Comments

Latest MCQs

Fertilizers are substances containing chemical elements such as manure or mixture of ______...?

(A) Lipids

(B) Carbohydrates

(C) Nitrates

(D) Proteins

Comments

Latest MCQs

The amount of heat needed to convert a substance from liquid to gas is called...?

(A) Heat of vaporization

(B) Specific heat

(C) Latent heat of fusion

(D) All

Comments

Latest MCQs

Which one of the following substances traps sunlight...?

(A) Cellulose

(B) Chlorophyll

(C) Cytoplasm

(D) Cell sap

Comments

Latest MCQs

Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________...?

(A) ionic substances

(B) metallic substances

(C) molecular solids

(D) covalent network solids

Comments

Latest MCQs

Which is the hardest substance in the human body...?

(A) Tooth enamel

(B) Skull

(C) Knee cap

(D) Rib

Comments

Latest MCQs

Which one is the brightest star in the night sky...?

(A) Betelgeuse

(B) Sirius

(C) Rigel

(D) Polaris

Comments

Latest MCQs

Which lists the substances from least to most acidic...?

(A) Blood, milk, ammonia, orange juice

(B) Blood, ammonia, milk, orange juice

(C) Milk, blood, orange juice, ammonia

(D) Ammonia, blood, milk, orange juice

Comments

Latest MCQs

A change in physical appearance or state of a substance is called ____...?

(A) Chemical Change

(B) Physical Change

(C) Nuclear Change

(D) Biological Change

Comments

Latest MCQs

Which of the following has the highest surface tension...?

(A) Glycerol in water

(B) Detergent in water

(C) Soap in water

(D) Water

Comments

Latest MCQs

What is the name of the substance that dissolves the substance...?

(A) Solute

(B) Solvent

(C) Solution

(D) Mixture

Comments

Latest MCQs

The process of vaporizing a solid substance and condensing the vapours to form the solid directly is known as...?

(A) Distillation

(B) Sublimation

(C) Filtration

(D) Crystallization

Comments

Latest MCQs

All of the following substances are crystalline except_____________...?

(A) Ice

(B) Diamond

(C) Sucrose

(D) Plastic

Comments

Latest MCQs

Which substance expands the most; for the same rise in temperature...?

(A) Water

(B) Air

(C) Copper

(D) Class

Comments

Latest MCQs

Which substance is the most alkaline...?

(A) Milk

(B) Blood

(C) Ammonia

(D) Organic juice

Comments

Latest MCQs

Which process is used to get back the solid substances from a solution...?

(A) Crystallization

(B) Distillation

(C) Filtration

(D) Sublimation

Comments

Latest MCQs

What is the large organelle that fills with cell sap and contains water and dissolved substances like sugar and salt...?

(A) Nucleus

(B) Mitochondria

(C) Large Vacuole

(D) Golgi Apparatus

Comments

Latest MCQs

A method which is used to separate coloured chemicals or substances, especially dyes is known as...?

(A) Filtration

(B) Sublimation

(C) Paper chromatography

(D) Distillation

Comments

Latest MCQs

Which of the following would be most useful in testing if a substance is either an acid or a base...?

(A) pH indicator strips

(B) Acid-base indicator

(C) Litmus paper

(D) Filter paper

Comments

Latest MCQs

Which of the following is the lightest substance...? Mcqs

PPSC Past Papers