Question

Assertion (A): Pent -1-ene and pent-2-ene are position isomers.

Reason (R): Position isomers differ in the position of functional group or a substituent.

• A. A is not correct but R is correct.
• B. Both A and R are correct and R is the correct explanation of A.
• C. Both A and R are not correct.
• D. Both A and R are correct but R is not the correct explanation of A.

Answer 1

The correct option is B

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

Analysing the assertion

Pent -1-ene and pent-2-ene are position isomers.

So, the assertion is correct.

Analysing the reason

Pent-1-ene and pent-2-ene differ in the position of double bond ( i.e., functional group). So, they are called as positional isomers.

Therefore, both assertion and reason are correct and reason is the correct explanation of assertion.

So, option (A) is the correct answer.