Question

Identify the substance which is:
(i) Used in making leads of pencils.
(ii) Used as a dry lubricant.
(iii) Used in making black paint and printers ink.
(iv) Used in nuclear reactors as a moderator.

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

Answer 1

Answer: (D)

Graphite

The substance with the following applications is Graphite. It is an allotrope of Carbon and is
(I) used in making leads of pencils.
(ii) used as a dry lubricant.
(iii) used in making black paint and printers ink.
(iv) used in nuclear reactors as a moderator.

It is also used in making electrodes, carbon arcs and in the refractory crucible.