Oxygen gas is not produced from the following decomposition reaction:

$A$ crystalline solid $X$ reacts with dil. $HCl$ to liberate a gas $Y$. $Y$ decolourises acidified $KMnO_4$. When a gas $Z$ is slowly passed into an aqueous solution of $Y$,colloidal sulphur is obtained. $X$ and $Z$ could be,respectively

An oxide of an element is a gas and dissolves in water to give an acidic solution. The element belongs to:

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{S}_8 + H_2O \longrightarrow$ No reaction

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{Cl}_2O_7 + H_2O \to HClO_4$

Name the type of silicate structure in which one oxygen atom of $[SiO_4]^{4-}$ is shared.