4-methylpent-1-yne and 3-methyl pent-1-yne show which type isomerism.A Chain isomerism B Position isomerism C Functional group isomerism D Metamerism

The compounds 4-methylpent-1-yne and 3-methylpent-1-yne show Position isomerism.

Here's why:

Isomerism is a phenomenon where two or more compounds have the same molecular formula but different structural formulas.

In the case of 4-methylpent-1-yne and 3-methylpent-1-yne, both compounds have the same molecular formula, C6H10, but the position of the methyl group (-CH3) and the triple bond (C≡C) are different.

In 4-methylpent-1-yne, the methyl group is attached to the fourth carbon atom and the triple bond is between the first and second carbon atoms.

In 3-methylpent-1-yne, the methyl group is attached to the third carbon atom and the triple bond is still between the first and second carbon atoms.

This difference in the position of the functional groups (methyl group and triple bond) in the carbon chain leads to Position isomerism.

So, the correct answer is B. Position isomerism.