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.

The treatment of galena with ${\mathrm{HNO}}_3$ produces a gas that is

Dissolving $1.24 \mathrm{g}$ of white phosphorous in boiling $\mathrm{NaOH}$ solution in an inert atmosphere gives a gas $\mathrm{Q}$. The amount of ${\mathrm{CuSO}}_4$ (in $\mathrm{g}$) required to completely consume the gas $\mathrm{Q}$ is____[Given: Atomic mass of $\mathrm{H}=1, \mathrm{O}=16, \mathrm{Na}=23, \mathrm{P}=31, \mathrm{S}=32, \mathrm{Cu}=63$]

In the detection of the nitrate ion, a brown complex in the form of a brown ring is formed at the junction of the two liquids. How many unpaired electrons does this brown complex contain?

In solid ${\mathrm{PI}}_5$, how many $\mathrm{P}-\mathrm{I}$ bonds are present in the cation?

The correct statement for the structure of ${\mathrm{P}}_4{\mathrm{O}}_{10}$ is

${\mathrm{NH}}_3$ can be obtained by

${\mathrm{PhCH}}_3\stackrel{{\mathrm{HNO}}_3+{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }\mathrm{A}\stackrel{{\mathrm{HNO}}_3+{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }\mathrm{B}\stackrel{\mathrm{Anhydrous} {\mathrm{HNO}}_3+\mathrm{Oleum}}{\to }\mathrm{C}$

What is the product C in the above reaction?

Chromium reacts with nitric acid to give a water-soluble salt of chromium and nitric acid.

Name the products formed when aluminium with dilute nitric acid.

Why chromium does not react with a powerful oxidizing agent ${\mathrm{HNO}}_3$?

Is chromium metal react with dilute nitric acid?

Write the chemical equation for the reaction of aluminium with dilute nitric acid.

Which of the following metal gives ${\mathrm{NH}}_4{\mathrm{NO}}_3$ with very dilute ${\mathrm{HNO}}_3?$

Give the reaction of lead(II) oxide and ammonia.

Iron(III) chloride $\left({\mathrm{FeCl}}_3\right)$ react with ammonia $\left({\mathrm{NH}}_3\right)$ and water to produce _____ (ferric/ferrous) hydroxide and ammonium chloride $\left({\mathrm{NH}}_4\mathrm{Cl}\right)$.

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

Ammonia acts as a reducing agent when it is reacted with lead oxide.

Ammonia reacts with lead oxide to form

When ammonia reacts with lead oxide, it oxidises into _____.