Class 10 Hindi MCQ Online Test

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    Class 10 Hindi mcq Online test for Students

    Which gas forms the largest proportion of the Earth’s Atmosphere?

    A) Oxygen

    B) Carbon dioxide

    C) Nitrogen

    D) Hydrogen

    Option c - Nitrogen

    The gas present in the maximum amount in air is

    A) Hydrogen

    B) Carbon dioxide

    C) Oxygen

    D) Nitrogen

    Option d - Nitrogen

    If all plants and trees disappeared from the Earth, which gas would show a decline?

    A) Carbon dioxide

    B) Nitrogen

    C) Water vapour

    D) Oxygen

    Option d - Oxygen

    The international conference held at Rio de Janeiro is known as

    A) United Nations Conference on Sustainable Development

    B) Environment and Pollution Summit

    C) International New Economics Conference

    D) None of the above

    Option a - United Nations Conference on Sustainable Development

    What do we call the thin blanket of gases surrounding the Earth?

    A) Biosphere

    B) Water particles

    C) Atmosphere

    D) Hydrosphere

    Option c - Atmosphere

    Air can best be described as a

    A) Compound

    B) Element

    C) Mixture

    D) Electrolyte

    Option c - Mixture

    What percentage of nitrogen is present in dry air?

    A) 21%

    B) 27%

    C) 50%

    D) 78%

    Option d - 78%

    Which of the following is regarded as the ideal concentration of carbon dioxide for maintaining natural atmospheric balance?

    A) 0.02%

    B) 0.03%

    C) 0.04%

    D) 0.05%

    Option b - 0.03%

    Which one of the following noble gases is absent from atmospheric air?

    A) Helium

    B) Argon

    C) Radon

    D) Neon

    Option c - Radon

    We covered all the Class 10 Hindi mcq online test above in this post for free so that you can practice well for the exam.

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