Q. 1. While lighting a candle, Paheli observed the following changes. (i) Wax was melting (ii) Candle was burning (iii) Size of the candle was reducing (iv) Melted wax was getting solidified Of the above, the changes that can be reversed are (a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (i) and (iv)

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  • Solution:

(d): Wax was melting; Melted wax was getting solidified

Solid wax can be melted and melted wax gets solidifies again. Hence melting of wax and its solidification are reversible changes.

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