Question

Q76) Which of the following are physical changes?

i) Melting of iron metal

ii) Rusting of iron metal

iii) Bending of an iron rod

iv) Drawing a wire of iron metal

Options:

• A. a) i, iii and iv
• B. b) ii and iii only
• C. c) iii and iv only
• D. d) i and iv only ​​​​​​​

Answer 1

The correct option is A

a) i, iii and iv

A)

Explanation: Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.Melting is the physical change, temperature and melting points are physical properties. Simply adding heat to a substance doesn't necessarily mean that chemical bonds will be broken or formed.