What may be expected to happen when phosphine gas is mixed with chlorine gas?

Which product will be obtained in the following reaction?

Reaction : ${\mathrm{P}}_{\mathrm{4}}\left(\mathrm{s}\right) + 3\mathrm{NaOH}\left(\mathrm{aq}\right) + 3{\mathrm{H}}_{\mathrm{2}}\mathrm{O}\left(\mathrm{l}\right)\mathrm{ }\stackrel{}{\to }$

The molecular formula for phosgene and tear gas are ______ and ______ respectively.

Which is TRUE with regard to the properties of ${\mathrm{PH}}_{\mathrm{3}}$?

Which element of the nitrogen family produces maximum number of oxo$-$acids?

What is the basicity of orthophosphorus acid?

${\mathrm{P}}_{\mathrm{4}}{\mathrm{O}}_{\mathrm{10}}$ is the anhydride of ______.

Which among the following group $16$ elements, exists in more number of  allotropic states?

Which is the most stable allotrope of sulphur?