solve it

In 2 is it Na/NH₃ or just NH₃?

I THINK IT IS NH3.. ITS LP WILL ATTACK CARBONYL GROUP.....

2)........

in the first question the only change that(i think!) will happen is : the triple bond will get converted to the double bond as lindlar's catalyst has been used.

will anything other than this occur??

No, in 1st question there is a proton too. Hydrolysis of ether groups into separate alcohols takes place, then reduction of alkyne.

YAAR PRITISH IS MY ANS TO 2) CORRECT.

Manmay I don't know..it looks like an imine-formation reaction, but there is no acid present...neither is it Na/NH₃(trans hydrogenation agent)