First slide

Alkynes

Question

How many among the following can have more Boiling points than the but–1–yne?

Difficult

A

5
B

6
C

7
D

8

Solution

Terminal Alkynes are having low Boiling points than internal Alkynes. With the increase in the carbon number the Boiling points of alkyne will increase. but–2–yne, pent–1–yne, pent–2–yne, hex–1–yne, hex–2–yne, and hex–3–yne are having more Boiling point than but–1–yne

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