Assertion (A) : Graphite is slippery and used as a lubricant.Reason (R) : Graphite has free electron

Choose the correct alternative from the following : - Assertion (A) : Graphite is slippery and used as a lubricant.
Reason (R) : Graphite has free electrons.

A. Both A and R are true and R is the correct explanation of A.

B. Both A and R are true but R is NOT the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

E. Both A and R are false

Answer: B. Both A and R are true but R is NOT the correct explanation of A.

Graphite possesses a layer structure with two successive layers held by weak force and able to slide over one another.
So, graphite is slippery and this property finds its use as a lubricant.
In graphite, each carbon atom is linked to three other carbon atoms while one electron in the carbon atom is delocalised.
So, graphite has free electrons.

Posted in: Type 1 - Assertion and Reason - Verbal Reasoning

Choose the correct alternative from the following : - Assertion (A) : Graphite is slippery and used as a lubricant.Reason (R) : Graphite has free electrons.

Choose the correct alternative from the following : - Assertion (A) : Graphite is slippery and used as a lubricant.
Reason (R) : Graphite has free electrons.