Question

Following are the uses of a substance.

(i) It is used as an abrasive for cutting glass.

(ii) It is used as a tip of deep boring drills.

(iii) It is used for making dies for drawing wires.

(iv) It is used in generating laser beams in electronics.

What is the name of this substance?

• A. Diamond
• B. Buckminsterfullerene
• C. Lampblack
• D. Graphite

Answer 1

The correct option is A Diamond

Diamond is an allotropic form of carbon. It is the hardest substance known. Uses of a diamond are:

• It is used as an abrasive in cutting glass.
• It is used for making dies for drawing wires.
• It is used in generating laser beams in electronics.
• It is used as a tip of deep boring drills.
• It is ideal for grinding, cutting, drilling and polishing.

Hence, the correct option is $\text{A}$