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

Both Assertion (A) that Pent-1-ene and Pent-2-ene are position isomers, and Reason (R) that position isomers differ in the location of the functional group, are correct. The correct answer is option A.

Step-by-step explanation:

The assertion (A) that Pent-1-ene and Pent-2-ene are position isomers is correct. Position isomers are organic compounds that have the same molecular formula but the functional group or substituent is located at different positions on the carbon chain.

In the case of Pent-1-ene and Pent-2-ene, the position of the carbon-carbon double bond differs: in Pent-1-ene, the double bond starts at the first carbon, while in Pent-2-ene, it begins at the second carbon. The reason (R) stating that 'Position isomers differ in the position of functional group or a substituent' is also correct.

It provides the correct explanation for why Pent-1-ene and Pent-2-ene are considered position isomers. Hence, both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation of Assertion (A).