Properties of Compounds of Nitrogen

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

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 ${\mathrm{N}}_2$

Complete the following chemical reaction.

${\mathrm{S}}_8 + \mathrm{Conc}.{\mathrm{HNO}}_3 \stackrel{ }{\to }$
 

Complete the following chemical reaction.

${\mathrm{I}}_2 + \mathrm{conc}. {\mathrm{HNO}}_3 \stackrel{ }{\to }$

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

Give the reactions supporting basic nature of ammonia.

Shravani was performing inorganic qualitative analysis of a salt. To an aqueous solution of that salt, she added silver nitrate. When a white precipitate was formed. On adding ammonium hydroxide to this, she obtained a clear solution. Comment on her observations and write the chemical reactions involved.​

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
 

How does ammonia react with white precipitate of $\mathrm{AgCl}$ ?