Question

Alkynes exhibit types of isomerism:

• A. chain
• B. position
• C. functional
• D. all of the above

Answer 1

The correct option is D all of the above

Alkynes exhibit three types of isomerism Answer: Chain, position, functional

Alkynes are hydrocarbons with atleast one triple bond between carbon atoms. They will be called as terminal alkynes if the triple bond is present in the end of the carbon chain. They have the general formula of $C_n{H}_{2n-2}$ .
Alkynes have different structural isomers like chain isomerism, position isomerism, functional isomerism etc.

1. Chain isomers

Compounds having same molecular formula with difference in carbon chain pattern like linear or branch are called chain isomers. 1-Pentyne is chain isomer for 3-methyl Butyne.

2. Position isomers

Compounds having same molecular formula with difference in position of the functional group are called as position isomers. 1-Butyne and 2-Butyne are position isomers.

3. Functional group isomers

Compounds having same molecular formula with difference in nature of functional group are called as functional group isomers. Alkynes are functional group isomers for cyclo alkenes. For example pentyne and cyclo pentene are functional group isomers.