Compounds (A) and (C ) in the following reactions are
`CH_(3)CHO overset((i)CH_(3)MgBr)underset((ii)H_(2)O)to(A) overset(H_(2)SO_(4),Delta)to(B)overset("Hydroboration oxidation")to (C)`

Options

A. Identical
B. Positional isomers
C. Functional isomers
D. Optical isomers

Answer

B

Explanation

Chemical reaction can be shown as
`underset("Ethanal")(CH_3CHO)underset("(ii) "H_2O)overset("(i) "CH_3MgBr)to underset("Propan-2-ol")underset((A))(CH_3-underset(CH_3)underset(|)(CH)-OH) underset("Dehydration")overset(H_2SO_4, Delta)to underset("Propene")underset((B))(CH_3-underset(H)underset(|)C=CH_2) underset("(Hydroboration Oxidation)")overset("(i) "BH_3 " (ii) "H_2O_2//O overset(Ɵ)H)to underset("Propan-1-ol")underset((C))(CH_3-CH_2-CH_2OH)`
Thus, `CH_3underset(CH_3)underset(|)(CH)-OH` and `CH_3 - CH_2 - CH_2OH` are positional isomers.