Air and Atmosphere — Important Questions
ICSE · Class 6 · Chemistry
55 important questions from Air and Atmosphere for ICSE Class 6 Chemistry, with answers. Part of the ICSE Class 6 Chemistry syllabus.
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Important Questions from Air and Atmosphere
Which gas is essential for respiration in living beings?
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Oxygen
Oxygen is used in respiration to release energy from food.
What is the approximate percentage of oxygen in air?
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21%
Oxygen makes up about 21% of the air by volume.
Which of the following is NOT a component of air?
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Hydrogen
Hydrogen is not a major component of air. The main gases are nitrogen, oxygen, CO₂, and inert gases.
What is the name of the green pigment in plants that helps in photosynthesis?
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Chlorophyll
Chlorophyll traps sunlight for photosynthesis in green plants.
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