C2H2 (20% H2SO4, / 1%Hg2+)= A. A(Zn-Pb /HCL(concentrate) = B identify the 'A ' & ' B'?
A = ethanal; B = ethanol.
A. Hydration of ethyne
Aqueous sulfuric acid with a catalytic amount of
Thi initially-formed enol rapidly tautomerizes to an aldehyde or a ketone.
B. The Clemmensen reduction
I am guessing that you made a typo and that
Zinc amalgam and concentrated hydrochloric acid are classic reagents for the reduction of aldehydes and ketones to alcohols.