The bond angle and $\text{O-O}$  bond length in ${\text{O}}_{\text{3}}$ are, respectively, _____.

Ozone is present as a chief constituent in which region of the atmosphere?

Six volumes of oxygen, on the complete ozonization, form _____ volumes of ozone.

Ozone, on reaction with $\mathrm{KI}$ solution, finally produces ______.

The number of unpaired electrons in sulphur is ______.

Which statement about the sulphur dioxide gas is incorrect?

A crystalline solid $\text{'}\mathrm{X}\text{'}$ reacts with $\mathrm{dil}. \mathrm{HCl}$  to liberate a gas $\text{'}\mathrm{Y}\text{'}$. $\text{'}\mathrm{Y}\text{'}$ decolourises acidified ${\mathrm{KMnO}}_4$. When a gas $\text{'}\mathrm{Z}\text{'}$ is slowly passed into an aqueous solution of $\text{'}\mathrm{Y}\text{'}$, a colloidal sulphur is obtained. $\text{'}\mathrm{X}\text{'}$ and $\text{'}\mathrm{Z}\text{'}$ could be, respectively,

The oxidation numbers of sulphur in ${\text{S}}_{\text{8}}{\text{,S}}_{\text{2}}{\text{F}}_{\text{2}}{\text{, H}}_{\text{2}}\text{S}$, respectively, are _____.

What is produced by the contact process?