Question

Look at the diagram and answer the following questions:
i) What type of structure do diamond and graphite have?
ii) Why are diamonds used in cutting tools?
iii) Why is graphite used in electrical circuits?
iv) Name the force that accounts for the softness of graphite.
v) Name the precious diamond you know and give its weight in grams.

Answer 1

(i) Diamond- $s{p}^3$ structure tethedron

Graphite- $s{p}^2$ planar structure

(ii) Diamonds are used in cutting tools because it's a hardest crystalline allotrope of carbon.

(iii) Graphite can conduct electricity due to free electrons (dislocated $e^{-}$s) in it. So, used in electrical circuits.

(iv) Weak van der Waal forces between $2$ hexagonal layers of graphite are responsible for its softness.

(v) Kohinoor diamond

weight= $21.6$ grams ($105$ carat)