XNa(Excess)−−−−−−−→YCH3I(Excess)−−−−−−−−−→ Z. 'Z' forms isomer on hydrogenatio with
Na ,liq NH3
Pd
Lindlar's catalyst
1% HgSO4 + 30% H2SO4
X=C2H2;Y=C2Na2;Z=2−Butyne
BY←2−Butyne+H2X−→A. A and B are geometrical isomers, A is more symmetrical than B. Then X and Y are