A: Nitroso Iron [II] sulphate

B: Iron [III] chloride

C: Chromium sulphate

D: Lead [II] chloride

E: Sodium chloride.

Select from A, B, C, D and E —

(i) A compound soluble in hot water but insoluble in cold water.

(ii) A compound which in the aqueous solution state, is neutral in nature.

Select the correct answer from A, B, C and D –

(i) A weak organic acid is:

1. Formic acid
2. Sulphuric acid
3. Nitric acid
4. Hydrochloric acid

(ii) A complex salt is :

1. Zinc sulphate
2. Sodium hydrogen sulphate
3. Iron (II) ammonium sulphate
4. Tetrammine copper (II) sulphate

Select the one which contains solute ions and molecules.

1. NaOH soln.
2. Weak acid
3. Dil. H₂SO₄

Give balanced equation/s for the preparation of the following salts:

1. Copper [II] sulphate from CuO.
2. Iron [III] chloride from Fe.
3. K₂SO₄ from KOH soln.
4. Lead [II] chloride from PbCO₃ [give two equations].