Question

Boojho has learnt that non metals on beating with a hammer are generally broken into pieces. Which of the following is a non metal

• A. Iron nail
• B. Aluminum wire
• C. Copper plate
• D. Piece of coal

Answer 1

The correct option is D

Piece of coal

Explanation for correct option:

(D) Piece of coal

• Non-metal are bad conductors of heat and electricity.
• They are brittle and have low density.
• They are not strong.
• Based on the above property, a Piece of coal is non-metal, as it is particularly made up of Carbon which is non-metal.

Explanation for incorrect options:

(A) Iron nail

• Iron nail is a metal that is hard malleable and a good conductor of heat and electricity. So it cannot be a non-metal. So, this is an incorrect option.

(B) Aluminum wire

• Aluminum wire is a metal that is hard malleable and a good conductor of heat and electricity. So it cannot be a non-metal. So, this is an incorrect option.

(C) Copperplate

• Copper plate is a metal that is hard malleable and a good conductor of heat and electricity. So it cannot be a non-metal. So, this is an incorrect option.

Hence, the correct option is (D) Piece of coal.