Question

What are the minimum number of carbon atoms required for alkanes, alkenes and for alkynes to exhibit positional isomerism respectively?

• A. 2, 2, 2
• B. 2, 4, 6
• C. 6, 4, 2
• D. 6, 4, 4

Answer 1

The correct option is D 6, 4, 4

In an alkane chain, at least 6 C atoms are required. In an alkyne chain, at least 4 C atoms are required. In an alkene chain, at least 4 C atoms are required. So, the correct answer will be option (d).