Write the balanced equations when ammonium hydroxide is added to the aqueous solution of  ${\mathrm{FeSO}}_4$, Iron $\left(\mathrm{III}\right)$ chloride, lead nitrate and zinc nitrate?

Distinguish between the following (using ammonia solution) :

Ammonium chloride and sodium chloride.

Distinguish between the following (using ammonia solution) :

Ferric salt and ferrous salt.

Distinguish between the following (using ammonia solution) :

Sodium sulphate and ammonium sulphate.

Give balanced equation for the following conversion,  

Ammonia to nitrogen using an acidic gas.

Give balanced equation for the following conversion,

Ammonia to brown gas.
 

Give balanced equation for the following conversion,

Ammonia to nitrogen trichioride.

Give balanced equation for the following conversion,

Ammonia solution to an amphoteric hydroxide.
 

Give balanced equation for the following conversion,

A nitride of a trivalent metal to ammonia.