The compound which forms acetaldehyde when heated with dilute NaOH is

Options

A. 1,1,1-Trichloroethane
B. 1-Chloroethane
C. 1,2-Dichloroethane
D. 1,1-Dickloroethane

Answer

D

Explanation

Aldehydes are obained by alkaline hydrolysis of those geminal dihalides in which the halogens are attached to the terminal carbon. Thus reaction of 1,1-dichloroethane with NaOH gives acetaldehyde.
`underset("1,1-dichloroethane")(CH_(3)-overset(Cl)overset(|)(CH)-Cl overset(NaOH)(to)CH_(3)-underset("unstable")overset(OH)overset(|)(CH)-OH`
`overset(-H_(2)O)(to)underset("Acetaldehyde")(CH_(2)-CHO)`