Sodium hydroxide is produced on a large scale:

$Li$ shows a diagonal relationship with:

Match Column $-I$ with Column $-II$ :

Column $-I$	Column $-II$
$(a)$. Super oxide	$(p)$. $Na_2O_2$
$(b)$. Peroxide	$(q)$. $CO_2$
$(c)$. Dioxide	$(r)$. $C_3O_2$
$(d)$. Sub oxide	$(s)$. $CsO_2$

Compared to alkaline earth metals,what do alkali metals exhibit?

The white precipitate $(Y)$,obtained on passing a colourless and odourless gas $(X)$ through an ammoniacal solution of $NaCl$,loses about $37 \%$ of its weight on heating and a white residue $(Z)$ of basic nature is left. Identify $(X)$,$(Y)$,and $(Z)$ from the following sets.

$A$ substance $X$ is a compound of an element of group $IA$. The substance $X$ gives a violet colour in flame test. $X$ is