Question

Which of the following nonmetal is lustrous?

• A. Iodine
• B. Oxygen
• C. Sulphur
• D. Nitrogen

Answer 1

The correct option is A

Iodine

The explanation of the correct option:

(A) Iodine

• Lustrous materials have a shine on them, but most of the non-metals are not present in the solid state so they cannot reflect an incident light.
• But two non-metal elements show exception, diamond, and iodine.
• Iodine is a lustrous non-metal, which has free electrons.

The explanation of incorrect options:

(B) The elements whose atomic sizes are larger and electrons are loosely bound can show lustrous properties, but oxygen has smaller atomic sizes and its electrons are not loosely bound, so oxygen is non-lustrous.

(C) Sulfur has smaller atomic sizes and electrons are not loosely bound, so sulfur is non-lustrous.

(D) Nitrogen has smaller atomic sizes and electrons are not loosely bound, so nitrogen is non-lustrous.

Hence, the correct option is (A), Iodine. It is nonmetal which is lustrous.