Question

Give two examples each of reviversible and irreversible reaction

Answer 1

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Answer 2

Reversible change

i) If you keep water in the freezer for some time, it transforms into ice. But as soon as you take it out of the freezer, it turns into water again. This is a reversible change. Similarly

ii) if you boil water, it evaporates and becomes water vapor. When you cool this vapor down, it turns back to water.

Irreversible change

i) When you burn a piece of paper, it turns to ash. It cannot become paper again. Your height cannot decrease.

ii) Burning of candle