Question

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.​

Answer 1

Some 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​