JEE Main Chemistry question
How many of the following pairs represent positional isomers? (1) But-1-ene and but-2-ene; (2) But-1-ene and 2-methylprop-1-ene; (3) Prop-2-en-1-ol and methoxyethane; (4) *n*-Butane and 2-methylpropane.
Answer: 1
Solution
Positional isomers share an identical carbon skeleton and functional group, differing only in the position of that group. Only pair (1) satisfies this — both are CH alkenes on the identical straight-chain skeleton, differing solely in double-bond
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account