Properties of Compounds of Nitrogen

In the reaction of phosphorous with conc. ${\mathrm{HNO}}_3$, the oxidized and reduced products respectively are

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?

Concentrated nitric acid turns the colour of the skin into-

The brown ring test for nitrates depends upon

When ${\mathrm{PbO}}_2$ reacts with concentrated ${\mathrm{HNO}}_3$, the gas evolved is

Identify the reaction which does not liberate ${\mathrm{N}}_2$

When the copper metal is treated with a cold and dilute nitric acid, it forms

Which of the following is correct about ammonia?

When copper is heated with conc. ${\mathrm{HNO}}_3$ it produces
 

In the brown ring test, brown colour of the ring is due to

A brown ring is formed in the ring test for ${\mathrm{NO}}_3^{-}$ ion. It is due to the formation of

Which gas will be evolved when $\mathrm{Na}$ or $\mathrm{Mg}$ is reacted with dilute ${\mathrm{HNO}}_3$?

$\mathrm{AgCl}$ is very less soluble in water, but highly soluble in ${\mathrm{NH}}_3$ solution because :

Identify incorrect options about the properties of ${\mathrm{NH}}_3$.

Which of the following can be used to dry ammonia?

${\mathrm{FeSO}}_4$ forms brown ring with
 

The brown gas formed when ${\mathrm{HNO}}_3$ is reduced by metals is:

Chlorine reacts with excess of ammonia to give:

The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:

Regular use of which of the following fertilizers increases the acidity of soil?