Air and Atmosphere
ICSE · Class 7 · Chemistry
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Quick Quiz: Air and Atmosphere
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What is the main constituent of air by volume?
What percentage of air by volume is oxygen?
Which gas is called the active part of air?
Which gas is the most abundant inert gas in air?
Sample Questions
What is the percentage of carbon dioxide in air?
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0.03% to 0.04%
Carbon dioxide is present in air in a very small amount, about 0.03% to 0.04% by volume.
Which scientist proved in 1774 that air is a mixture of gases?
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Antoine Lavoisier
Antoine Lavoisier proved in 1774 that air is a mixture of gases.
Which gas was first discovered by Joseph Priestley in 1774?
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Oxygen
Joseph Priestley discovered oxygen in 1774 by heating mercury(II) oxide.
Which gas is essential for respiration?
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Oxygen
Living beings use oxygen in respiration to release energy from food.
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