The lead of lead pencils is not $P b$ but is:

calcium carbonate

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iron

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calcium sulphate

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graphite

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Solution

The correct option is D graphite
The common name pencil lead is due to a historic association with the stylus made of lead in ancient Roman times actually It is graphite, the allotrope of carbon. There is no lead in pencils . Rather, the core is made up of a -toxic mineral called graphite.

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