Tick the appropriate
(iv) Which of the following is used as a lubricant.

Diamond

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Graphite

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Sulfur

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Iodine

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Solution

The correct option is B
Graphite

Explanation:
Graphite is an allotrope of carbon.
The structure of graphite consists of hexagonal lattice in layered form.
Such layers of graphite are held together by a weak Van der Waals force of attraction.
Due to the weak internuclear force of attraction, the layers can slide over one another and giving it a slippery appearance.
Thus, graphite is used as a lubricant.
Therefore, option ‘B’ is correct.

Suggest Corrections

	Column I		Column II
(A)	Used as lubricant	(i)	Carbon dioxide
(B)	Oxide with three dimensional structure	(ii)	Graphite
(C)	Used in solar calls	(iii)	Silica
(D)	Anhydride of carbonic acid	(iv)	Silicone