Class 10 Hindi MCQ Online Test

Class 10 Hindi MCQ Online Test. We covered all the Class 10 Hindi MCQ Online Test in this post for free so that you can practice well for the exam.

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Class 10 Hindi MCQ Online Test for Students

In the atmosphere, the highest percentage is of

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

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The highest percentage of gas in the air is

A) Hydrogen

B) Carbon dioxide

C) Oxygen

D) Nitrogen

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If all the plants and trees vanish from the earth, the gas which will decrease is

A) Carbon dioxide

B) Nitrogen

C) Water vapor

D) Oxygen

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International Conference held in Rio de-Janeiro was

A) United Nations Conference on Sustainable Development

B) Environment and Pollution Summit

C) International New Economics

D) None of the above

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What is the thin layer of gases around the earth called?

A) Biosphere

B) Water particle

C) Atmosphere

D) Hydrosphere

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Air is a/an

A) Compound

B) Element

C) Mixture

D) Electrolyte

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Percentage of nitrogen in dry air

A) 21%

B) 27%

C) 50%

D) 78%

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Which of the following is considered to be the optimum concentration of carbon dioxide for natural balance in the atmosphere?

A) 0.02%

B) 0.03%

C) 0.04%

D) 0.05%

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Which one of the following Noble Gases is not present in the air?

A) Helium

B) Argon

C) Radon

D) Neon

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