Select an example of reversible change.
Wetting of paper
Rusting of iron
Burning of petrol
Baking cake
Wetting of paper is a reversible change as water can be evaporated by applying heat to get the dry paper.
Question 12
Which of the following changes cannot be reversed? Blowing of a ballon Folding a paper to make a toy aeroplane Rolling a ball of dough to make roti Baking cake in an oven Drying a wet cloth Making biogas from cow dung Burning of a candle
Which of the following changes are Reversible and Irreversible?
(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 a candle