Question

Least acidic hydrogen is present in-

a) Diethyl malonate
b) Pentane-2, 4-dione
c) Hexan-2,4-diene
d) propyne​

Answer 1

Least acidic hydrogen is present in-

a) Diethyl malonate

b) Pentane-2, 4-dione

c) Hexan-2,4-diene

d) propyne✔️✔️✔️✔️✔️

Your answer - D) Propyne

HOPE IT HELPS!!

Answer 2

ANSWER IS

OPTION D

Ethyne has two terminal acidic hydrogen atoms whereas propyne has one terminal acidic hydrogen atom. Moreover the electron donating methyl group attached to carbon atom on the other side of the triple bond decreases the acidity of the acidity of the alkynylhydrogen atom therefore ethyne is more acidic than propyne.