A by-product of the alkaline hydrolysis of tristearin is a

2SO\(_2\)\(_{(s)}\)  +  O\(_2\)\(_{(s)}\) ⇌  2SO\(_3\) ; ΔG° = - ve

For the above reaction to be feasible

Sodium in the above reaction is produced by 

The use of CFCs as a blowing agent has application in

The metal that will liberate H\(_2\) gas from dilute HNO\(_3\) is