Which of the following changes cannot be reversed? |
(a) Blowing of a balloon |
(b) Folding a paper to make a toy aeroplane |
(c) Rolling a ball of dough to make roti |
(d) Baking cake in an oven |
(e) Drying a wet cloth |
(f) Making biogas from cow dung |
(g) Burning of candle |
Answer:
The changes that cannot be reversed are given as below: (a) Baking cake in an oven (f) Making biogas from cow dung (g) Burning of a candle
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