A. What are reversible and irreversible changes? Give one example for each. [2]B. What do you observe when a little amount of curd is added to a bowl containing warm milk and kept for five hours? [2]C. Why is evaporation faster in the case of a china dish than a test tube? [3]D. A burning candle shows both physical and chemical changes. Explain. [3]

A. What are reversible and irreversible changes? Give one example for

1.	A. What are reversible and irreversible changes? Give one example for each. [2]B. What do you observe when a little amount of curd is added to a bowl containing warm milk and kept for five hours? [2]C. Why is evaporation faster in the case of a china dish than a test tube? [3]D. A burning candle shows both physical and chemical changes. Explain. [3]
Answer» A. What are reversible and irreversible changes? Give one example for each. [2] B. What do you observe when a little amount of curd is added to a bowl containing warm milk and kept for five hours? [2] C. Why is evaporation faster in the case of a china dish than a test tube? [3] D. A burning candle shows both physical and chemical changes. Explain. [3]

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