Question

b.
Which of the following is an example of a chemical change?
i. Heating of an iron rod
ii. Boiling of water
iii. Heating of sugar
iv. Heating of sugar solution​

Answer 1

Answer:

heating of sugar solution is the right answer mate

Answer 2

So heating of sugar solution option is correct

a , b and c represents physical changes and d represents chemical changes.

Physical changes:

a) Hammering of a red hot iron rod to make a flat sheet.

b) Formation of ice by cooling of water.

c) Rising up of water vapors from sea to make clouds.

Chemical changes:

d) Heating of charcoal in air to high temperature till it begins to flow.

Note : During physical change there is no change in the nature of substance. However during chemical change a chemical reaction converts one substance into another with energy being either released or given out.