Which of the following gases has an important role in maintaining atmospheric temperature...? Mcqs

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Which of the following gases has an important role in maintaining atmospheric temperature...?

(A) Nitrogen
(B) Argon

(C) Oxygen
(D) Carbon dioxide

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Optical fiber works on the principle of ______...?

(A) Scattering
(B) Total Internal Reflection

(C) Interference
(D) Principle of refraction

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In SI unit of time Picosecond is equal to how many seconds:...?

(A) 10
(B) 10-12

(C) 10-18
(D) None of these

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The nonrenewable source of energy is:...?

(A) Wind energy
(B) Solar energy

(C) Hydropower
(D) None of these

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Which planet takes the longest time to go once around the Sun...?

(A) Neptune
(B) Mars

(C) Jupiter
(D) Earth

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Who invented the steam engine...?

(A) James Watt
(B) Faraday

(C) Bessel
(D) All of these

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Air is a mixture of _______...?

(A) Solid
(B) Liquid

(C) Gas
(D) None of these

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What is the boiling point of water...?

(A) 60 °C
(B) 80 °C

(C) 100 °C
(D) 120 °C

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The energy generation in starts is due to ...?

(A) Fission of heavy nuclei
(B) Fusion of light nuclei

(C) Fusion of heavy nuclei
(D) None of these

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Jupiter is bigger than the earth...?

(A) 7 Times
(B) 11 Times

(C) 50 Times
(D) 100 Times

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