Q. 1. Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

Solution:

Few properties by which we can prove that these materials are different: Chalk – Hard, rough, non-lustrous

Iron nail – Hard, smooth, lustrous Wood – Hard, rough, non-lustrous Aluminium – Hard, smooth, lustrous

Candle – Hard, smooth, non-lustrous Cotton – Soft, smooth, non-lustrous