Question

Which of the following shows position
isomerism
(a) propene
(b) ethane
(c) butene
(d)2methyl
propene​

Answer 1

Answer:

(c) Butane is the right answer

Answer 2

The correct option is d.

• The isomerism formed due to different positions of a group of atoms is called position isomerism.
• Propane, ethane and butane have a normal linear structure. Thus the position of the atoms is fixed here.
• In 2-methyl propane, the methyl group can reside at 1,2 or 3 positions. Thus, the methyl group can change its position and can show the position of isomerism.