Direction: Choose the correct alternative from the following options as given below for the Assertion (A) and Reason (R) given in each of the questions.
Assertion (A) Graphite is slippery and used as a lubricant. Reason (R) Graphite has free electrons.
if both A and R are true and R is the correct explanation of A
if both A and R are true and R is not the correct explanation of A
if A is true but R is false
if A is true but R is true
Correct Option: B
In graphite, each carbon atoms is linked to three other carbon atoms, while one electron in the carbon atom is delocalised. So, graphite has free electrons and it is also used as a lubricant but reason does not explains assertion.