Name the anion present in the following compound:

When a barium chloride solution is added to a solution of compound B, a white ppt. insoluble in dil. HCl is formed.

Give one chemical test to distinguish between the following pair of compounds:

Zinc sulphate solution and zinc chloride solution.

Give one chemical test to distinguish between the following pair of compounds:

Iron (II) chloride solution and iron (III) chloride solution.

Give one chemical test to distinguish between the following pair of compounds:

Complete and balance the following equation:

${\mathrm{CuSO}}_4+{\mathrm{NH}}_4\mathrm{OH} \left(\mathrm{excess}\right) \underset{}{\to }$

Complete and balance the following equation:

${\mathrm{ZnCl}}_2+\mathrm{NaOH} \left(\mathrm{excess}\right) \stackrel{}{\to }$