The SI standard of time is based on_____________...?

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The SI standard of time is based on_____________...?

(A) the daily rotation of the earth

(B) the frequency of light emitted by Kr86

(C) the yearly revolution of the earth about the sun

(D) a precision pendulum clock

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‘Magnetometer’ is used to measure: ______________...?

(A) Air Pressure on Ships

(B) Electromagnetic Force in Space Devices

(C) Changes in the Earth’s Magnetic Field

(D) Changes in Oceanic Current

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Maximum biological damage is caused by ____________...?

(A) Gamma rays

(B) Alpha rays

(C) Beta rays

(D) Microwaves

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Dry ice is ___________...?

(A) Methane hydrate

(B) Liquid Nitrogen

(C) Solid Carbon dioxide

(D) Frozen Water

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PSR J0108-1431 is the closest known ______________ to Earth...?

(A) Black hole

(B) Red giant

(C) Quasar

(D) Pulsar

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Parkinson is a disease of____________...?

(A) Eyes

(B) Brain

(C) Heart

(D) Lungs

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Mercury, Venus, Earth and Mars are called___________...?

(A) Dwarf Planet

(B) Gaseous Planets

(C) Terrestrial Planets

(D) Both A & B

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Mohus scale is used for to measure ____________...?

(A) Hardness

(B) Humidity

(C) Pressure

(D) Temperature

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In middle latitudes, which cloud will have the lowest base ________________________ ...?

(A) Cirrostratus

(B) Stratocumulus

(C) Altocumulus

(D) Cirrus

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An atom is_____________...?

(A) smallest indivisible particle in an element

(B) smallest particle of an element which can undergo a chemical reaction

(C) building block of an element

(D) always smaller than molecule

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The disease “Itai Itai “is caused by____________...?

(A) Carbon

(B) Cadmium

(C) Manganese

(D) None of these

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The thermosphere extends from an altitude of to the base of at ...?

(A) 75 km, Mesosphere, 670 km

(B) 80 km, Ionosphere, 680 km

(C) 85 km, Exosphere, 690 km

(D) 90 km, Ozone Layer , 690 km

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DNA is _____________...?

(A) Acetic Acid

(B) A class of nucleic acids

(C) Citric Acid

(D) None of these

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Comets are made mostly of ______________...?

(A) Ice and dust

(B) Dust and lights

(C) Ice, dust and lights

(D) All of the above

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Fog that most often forms as warm rain falls into a cold layer of surface air is called ______________...?

(A) Radiation fog

(B) Evaporation (mixing) fog

(C) Advection fog

(D) Upslope fog

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Candela is the basic unit of_________________...?

(A) luminous intensity

(B) heat producing value

(C) Thermodynamic temperature

(D) radioactive decay

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Monsoon is caused by____________________...?

(A) Seasonal reversal of winds

(B) Revolution of earth

(C) Movement of clouds

(D) Rise in temperature

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Joint in which bones are joined together by fibrous tissues is called _____________ ...?

(A) Fibrous joint

(B) Cartilaginous joint

(C) Synovial joint

(D) Ball and socket joint

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Diamond is harder than Graphite because of___________...?

(A) Difference in crystalline Structure

(B) Tetrahedral structure of diamond

(C) Difference in layer of atoms

(D) None of these

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Fine organic or inorganic particles suspended in air is called _______________...?

(A) particulate pollutant

(B) gaseous pollutant

(C) aerosol

(D) none of these

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Ozone layer thickness is measured in____________...?

(A) Metre

(B) Joule

(C) Pounds

(D) Dobson

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Terrestrial planets in solar system are made of____________...?

(A) Metal

(B) Rock

(C) Both A and B

(D) None of the above

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Role of biotechnology in the production of food based on ___________...?

(A) Decomposition

(B) Respiration

(C) Digestion

(D) Fermentation

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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

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Tetanus is caused by____________...?

(A) Clostridium

(B) Virus

(C) Bacteriophage

(D) Salmonella

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Ice mass that covers more than fifty-thousand square kilometers of land area is classified as____________...?

(A) ice sheet

(B) ice field

(C) glacier erosions

(D) ice cap

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The SI standard of time is based on_____________...? Mcqs

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