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Classify each of the following, as a physical or a chemical change. Give reasons. 

(a) Drying of a shirt in the sun. 

(b) Rising of hot air over a radiator. 

(c) Burning of kerosene in a lantern. 

(d) Change in the colour of black tea on adding lemon juice to it. 

(e) Churning of milk cream to get butter.

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Hint—Physical changes —(a), (b), (e) 

Chemical changes— (c), (d)

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