Question

The number of isomers possible for the compound with the structure 

CH₃CH = CH-CH = CH - CH₂CHOHCH₃ is

(a) 2

(b) 4

(c) 6

(d) 8

Answer 1

Correct option is (d) 8

Since the compound has two dissimilarly substituted double bonds, the number of geometrical isomers will be 2² = 4

Further due to the presence of asymmetric carbon atom (marked by asterik"), each of the above four geometical isomer can exist in two optically active forms, so the total number of isomers 4 x 2 = 8