Question

The molecule 3-penten-2-ol can exhibit

1. optical isomerims

2. geometrical isomerism

3. Metamerism

4. tautomerism

(a) 1 and 2

(b) 1 and 3

(c) 2 and 3

(d) 1 and 4

Answer 1

Correct option is (a) 1 and 2

Note the presence of asymmetric carbon atom (denoted by asterisk*) which gives rise to optical isomerism. Presence of double bond whose each carbon atom has two different groups gives rise to geometrical isomerism.