Question

Which of the following is used in pencils?

• A. Graphite
• B. Silicon
• C. Charcoal
• D. Phosphorous

Answer 1

The correct option is A

Graphite

Explanation for correct option:

A. Graphite

• The graphite has a layered structure that is held together by weak van der Waal forces.
• The layered structure of graphite is shown below:
• 

• Graphite is used in pencils as it is a greyish-black, opaque mineral that is soft enough to leave a black mark.
• Pencils are made up of a common form of carbon which is known as graphite.

Explanation for incorrect options:

Silicon, Charcoal, and Phosphorus are not found in pencils. Thus options B, C, and D are incorrect.

Hence, the correct option is A i.e. Graphite is used in pencils.