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A lead pencil containsmixture....

A lead pencil contains____mixture.

A

lead-clay

B

charcoal-clay

C

graphite-clay

D

carbon back-clay

Text Solution

Verified by Experts

The correct Answer is:
C
Graphite is used as graphite - clay mixtures in lead pencils. The higher the proportion of clay, the "harder" the pencil. The common mixture is designated `''HB''`. the higher - clay (harder) mixtures are designated by various `''H''` numbers, for example, `''2H''`, the higher - graphite (softer) mixtures are designated by various `''B''` numbers.
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