Question

Which of the following is not a chemical change?
a) Inflating a balloon
b) Burning candle
c) Heating sugar
d) Rusting of iron

Answer 1

$\huge\red{A}\pink{N}\orange{S}\green{W}\blue{E}\gray{R}$

(a) Inflating a balloon.

Explanation:

Burning of candle is a chemical reaction as the thread in the candle undergoes chemical reaction in presence of oxygen to turn into ash/sute.

Heating of sugar is again a chemical reaction as sugar turns into caramel.

Rusting of iron again Involves Chemical reaction with oxygen to turn into in ferrous oxide.