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Ores and Minerals

is an allotro...

Question

is an allotrope of carbon that is used in lead pencil.

A

Graphite

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B

Diamond

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C

Graphite

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D

Lead

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Solution

The correct option is C Graphite
Graphite is an allotrope of carbon and is very soft. It is mixed with some clay for manufacturing lead pencil.

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Q. A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads.
(a) What is element X?
(b) Name the allotrope Y.
(c) State whether allotrope Y is a good conductor or non-conductor of electricity.
(d) Name one use of allotrope Y (other than lubrication and pencil leads)
(e) Name two other allotropes of element X.

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(b) State whether

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(a) It is an allotrope of carbon.
(b) It is good conductor of heat and electricity.
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