Question

Which of the following are correct structural isomers of butane?
(i)

(ii)

(iii)

(iv)

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer 1

Structural isomers have same molecular formula but different structure. In the given options, (i) and (iii) have same molecular formula as butane ($C_4{H}_{10}$ but exhibit different structures. Therefore, correct option is (a)- (i) and (iii).