3.
Acetylenic hydrogen are acidic because
(a) Sigma electron density of C–H bond in acetylene is nearer
to carbon, which has 50% s-character
(b) Acetylene has only one hydrogen on each carbon
(c) Acetylene contains least number of hydrogen among the
possible hydrocarbons having two carbons
(d) Acetylene belongs to the class of alkynes with molecular
formula CnH2n-2
