Question

Why non-metals do not conduct electricity?

• A. They have enough free electrons
• B. They do not have free electrons.
• C. They have a weak force of attraction
• D. None of the above

Answer 1

The correct option is B

They do not have free electrons.

Explanation for correct option:

(B) They do not have free electrons.

• Non-metals are poor conductors of heat and electricity.
• Because they do not have any free electrons to conduct electricity.
• Non-metals do not have a shiny appearance.
• They have low melting point than metals.
• Mostly non-metals form covalent and ionic bonds.
• They are highly electronegativity.
• Examples of non-metals are Carbon, Sulphur, Nitrogen, Phosphorous and oxygen etc..
• Current will conduct if there is a free electron. Here no free electrons that's why non-metals do not conduct electricity. So, this is the correct option.

Explanation for incorrect option:

(A) They have enough free electrons.

• If there are enough free electrons then metals can conduct electricity. But not actually they have free electrons. So, it is an incorrect option.

(C)They have a weak force of attraction

• The weak force of attraction is not the real reason for the non-conduction of electricity by non-metals. So, it is an incorrect option.

(D) None of the above.

• They do not have free electrons. So that is the reason for the nonconduction of electricity. So, this is the incorrect option.

Therefore, the correct option is (B) They do not have free electrons.