Question

Lustrous non-metal is :

• A. Diamond
• B. Iodine
• C. Sulphur
• D. Both A and B

Answer 1

The correct option is D

Both A and B

Explanation for the correct option

Option D: Both A and B

Luster

• The property of an element that makes it appear shiny by reflecting light from its surface is called luster.
• Usually, metals are lustrous and non-metals are not lustrous.

Lustrous non-metals

• Non-metals generally have a dull appearance.
• However, diamond and iodine are exceptions. These two non-metals are lustrous.

Explanation for the incorrect options:

Option A: Diamond

• Diamond is a lustrous non-metal.
• However, iodine is also a lustrous non-metal.
• Since both options A and B are correct. This option is incorrect.

Option B: Iodine

• Iodine is a lustrous non-metal.
• However, diamond is also a lustrous non-metal.
• Since both options A and B are correct. This option is incorrect.

Option C: Sulphur

• Sulphur is a non-lustrous non-metal.
• Hence this option is incorrect.

Hence option D, Both A and B is the correct option.