Choose whether the given statement is true/false:

Lead pencil is made up of lead metal.

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True

False

answer is B.

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Detailed Solution

The given statement is false.
Concept- The pencil consists of a solid core inside a protective case. The shell prevents the core from breaking. The black part that is used to write is made up of an allotrope of carbon.
Carbon has three allotropes: diamond, graphite, and fullerene. The core of the pencil is made of a mixture of graphite powder and clay. The pencil is actually a graphite pencil.
Thus, the core of the pencil is made of thin graphite, which is enclosed in a shell of some other material, which is made of wood, plastic or recycled paper. So the pencil is made of graphite powder, which is an allotrope of carbon and not lead.
Thus, the correct statement is, “The lead pencil is made up of graphite and not lead metal”.
Hence, the correct option is (2).

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