Two of the products formed by the reaction of ' $X$ with HCl are gases. What is ' $X$ '?

Hydrated sodium aluminium silicate is called

Which of the allotropic forms of carbon is aromatic in nature?

$\mathrm{P}_2 \mathrm{O}_3+\mathrm{H}_2 \mathrm{O} \rightarrow X$, Red $\mathrm{P}_4+$ alkali $\rightarrow Y$

$X, Y$ are oxoacids of phosphorous. The number of $\mathrm{P}-\mathrm{OH}$ bonds in $X, Y$ respectively is

$$ \mathrm{P}_2 \mathrm{O}_3+\mathrm{H}_2 \mathrm{O} \rightarrow X $$