Correct the following:

(a) A reddish-brown precipitate is obtained when ammonium hydroxide is added to ferrous sulphate.

(b) Liquid ammonia is a solution of NH₃.

(c) Finely divided platinum is used in Haber's Process.

(d) Conc. H₂SO₄ is a drying agent for NH₃.

(e) Ammonium salts, on heating, decompose to give ammonia.

Choose the correct from the following:

Ammonia can be obtained by adding water to

A : Ammonium chloride.

B : Ammonium nitrite.

C : Magnesium nitride.

D : Magnesium nitrate

Nitrogen gas can be obtained by heating

1. Ammonium nitrate
2. Ammonium nitrite
3. Magnesium nitride
4. Ammonium chloride

Ammonia can be obtained by adding water to:

1. NH₄Cl
2. Mg₃N₂
3. Mg (NO₃) ₂
4. (NH₄)₂ SO₄