Question

While lighting a candle, Paheli observed the following changes.

1. Wax was melting
2. Candle was burning
3. Size of the candle was reducing
4. Melted wax was getting solidified. of the above, the changes that can be reversed are

विकल्प

• (i) and (ii)

• (ii) and (iii)

• (iii) and (iv)

• (i) and (iv)

Answer 1

(i) and (iv)

Explanation - 

Molten wax solidifies and the solid wax can be again melted. Hence melting of wax and its solidification are reversible changes.