Question
How is clayey soil useful for crops?
✓
Answer
Due to the very small size of the particles of clayey soil, particles are packed tightly and therefore can retain water. Clayey soil is also rich in organic matter. For growing crops such as wheat, gram, and paddy, the soil that is good at retaining water and rich in organic matter is suitable. Therefore, clayey soils having these characteristics are useful for such kind of crops.
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Q.1. What did Rakshita observe when she passed exhaled air into lime water?
(a) The lime water became clear
(b) The lime water turned blue
(c) The lime water turned milky
(d) The lime water evaporated
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(a) It contains more oxygen than inhaled air
(b) It contains nitrogen gas
(c) It contains more carbon dioxide than inhaled air
(d) It is cooler than inhaled air
Q.3. How is this experiment helpful in understanding respiration?
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(b) It shows that carbon dioxide is a product of respiration
(c) It confirms that air does not affect lime water
(d) It demonstrates that carbon dioxide dissolves lime water.
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