The blueness of the sky is mainly due to _____________...? Mcqs

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The blueness of the sky is mainly due to _____________...?

(A) The scattering of sunlight by air molecules
(B) The presence of water vapor

(C) Absorption of blue light by the air
(D) Emission of blue light by the atmosphere

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

(A) Air temperature
(B) Relative humidity

(C) Air pressure
(D) Air density

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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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LPG consists mainly of : ___________...?

(A) Methane,Ethane & Hexane
(B) Ethane,Hexane &Nonane

(C) Methane,Butane & Propane
(D) All of these

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The atmospheric greenhouse effect is produced mainly by the __________________...?

(A) Absorption and re-emission of visible light by the atmosphere
(B) Absorption and re-emission of ultraviolet radiation by the atmosphere

(C) Absorption and re-emission of infrared radiation by the atmosphere
(D) Absorption and re-emission of visible light by clouds

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The blue colour of clear sky is due to_______________...?

(A) Reflection of light
(B) Refraction of light

(C) Diffraction of light
(D) Dispersion of light

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