Dr. S.N. DHAWAN, Dr. S.C.KHETERPAL and, P.N.KAPIL Solutions for Chapter: p-Block Elements (Nitrogen Family), Exercise 6: Competition Focus

In which of the following compounds, nitrogen exhibits the highest oxidation state?

The maximum number of oxidation states which nitrogen can show in its compounds is.

The total number of lone pairs of electrons in ${\mathrm{N}}_2{\mathrm{O}}_3$.

Amongst the following, how many metals become passive when dipped in concentrated ${\mathrm{HNO}}_3$.

 $\mathrm{Sn}, \mathrm{Pb}, \mathrm{Fe}, \mathrm{Cr}, \mathrm{Zn}, \mathrm{Ni}, \mathrm{Hg}, \mathrm{Al}, \mathrm{Cu}$

What is the basicity of hypophosphorous acid?

$\mathrm{X}$ is a pale yellow solid. It hydrolyses in moist air and finally gets converted into phosphoric acid. $\mathrm{X}$ exists as an ionic solid. The total number of atoms present in its cation is.

Among the following, the number of compounds that can react with ${\mathrm{PCl}}_5$ to give ${\mathrm{POCl}}_3$ is:

${\mathrm{O}}_2, {\mathrm{CO}}_2, {\mathrm{SO}}_2, {\mathrm{H}}_2\mathrm{O}, {\mathrm{H}}_2{\mathrm{SO}}_4, {\mathrm{P}}_4{\mathrm{O}}_{10}$

The total number of compounds having at least one bridging oxo group among the molecules given below is-

${\mathrm{N}}_2{\mathrm{O}}_5, {\mathrm{N}}_2{\mathrm{O}}_3, {\mathrm{P}}_4{\mathrm{O}}_6, {\mathrm{P}}_4{\mathrm{O}}_7, {\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_5, {\mathrm{H}}_5{\mathrm{P}}_3{\mathrm{O}}_{10}, {\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_3, {\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_5$