`Xunderset((1)/(2)H_(2))overset(Na)toYunderset(Delta)overset(NaOH+CaO)toZ`, if Z is the first homologue of alkane series, then X

+ NaOH underset(Delta)overset(CaO)to A + Na_2CO_3 , A is

CH_(3)-C -= N +underset("(excess)")(H_(2)O) overset(H^(+))to A underset(Delta)overset(NaOH+CaO)to B B is ?

C_6 H_5 CH_2 - MgBr underset((2) H_3 O^+)overset((1) CO_2//"ether")to 'X' underset(Delta)overset(NaOH + CaO)to 'Y' ? What is the final product in this reaction ?

overset(I_2//NaOH)underset(Delta)to overset(H^+)to overset(Delta)to A, A is

CH_(3)-C-=underset(Hg^(+2))overset(dil.H_(2)SO_(4))(to)Xunderset(Delta)overset(Ba(OH)_(2))(to)Y,Y is

CH_(3)-C-=CHunderset(Hg^(+2))overset(dil.H_(2)SO_(4))(to)Xunderset(Delta)overset(Ba(OH)_(2))(to)Y,Y is

In the reaction : CH_(3)COOH overset(NaOH)rarr X underset("Heat")overset(NaOH, CaO)rarr Y, Y is :

CH_(3)COOHoverset(NaOH)to[A]underset(CaO)overset(NaOH)to[B]underset(hv)overset(Br_(2))to[C]