Important Compounds of Group 15 Elements

State which of the following statements are true:

(i) Nitrogen is more reactive than phosphorus  $\left({\mathrm{P}}_4\right)$

(ii) All the bonds in  ${\mathrm{PCl}}_5$  are of equal length.

Explain the reason for non-reactivity of some metals with concentrated ${\mathrm{HNO}}_3$.

The major uses of compound $\mathrm{A}$ is in the preparation of nitroglycerin, trinitrotoluene etc. then compound $\mathrm{A}$ is

In which of the following cases the same gas will be obtained as the gas liberated on heating of ammonium dichromate?

The number of oxygen atoms attached to each $\mathrm{P}$ in ${\mathrm{P}}_2{\mathrm{O}}_5$ is

Give the names of metals that do not react with conc. ${\mathrm{HNO}}_3$.

In brown ring test for nitrate ions, brown ring is formed having composition 

When bismuth chloride is dissolved in water a white precipitate appears. The white precipitate is

Who has the highest bond angle among the hydrides of the15th group?

The colour of ${\mathrm{PCl}}_5$ powder is:

Phosphorus reacts with chlorine gas to give a colourless liquid, which fumes in moist air to produce $\mathrm{HCl}$ and

$\mathrm{N}-\mathrm{N}$ bond length minimum in :

What is the colour of phosphorus pentachloride.

A colourless, neutral, paramagnetic oxide of Nitrogen $\text{'}\mathrm{P}\text{'}$ on oxidation gives reddish brown gas $\mathrm{Q}.$ $\mathrm{Q}$ on cooling gives colourless gas $\mathrm{R}. \mathrm{R}$ on reaction with $\mathrm{P}$ gives blue solid $\mathrm{S}.$ Identify $\mathrm{P}, \mathrm{Q}, \mathrm{R}, \mathrm{S}$ respectively.

Which of the following compound on heating gives ${\mathrm{N}}_2\mathrm{O}?$

Which of the following is a mixed anhydride :

Concentrated nitric acid turns the colour of the skin into-

The compound produces ammonia when reacted with water is-

Which among the following compounds is used for the preparation of Nitrogen (IV) oxide?

Which is less hydrolysied :