Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:

(a) Sodium sulphate

(b) Copper sulphate

(c) Iron (II) sulphate

(d) Zinc carbonate

From the formula listed below, choose one, in each case, corresponding to the salt having the given description :

AgCl, CuCO₃, CuSO₄.5H₂O, KNO₃, NaCl, NaHSO₄, Pb(NO₃)₂, ZnCO₃, ZnSO₄.7H₂O

(a) an acid salt.

(b) an insoluble chloride.

(c) on treating with concentrated sulphuric acid, this salt changes from blue to white.

(d) on heating, this salt changes from green to black.

(e) this salt gives nitrogen dioxide on heating.

State the terms defined by the following sentences:

(a) A soluble base

(b) The insoluble solid formed when two solution are mixed together.

(c) An acidic solution in which there is only partial ionization of the solute molecules.

Which of the following methods A, B, C, D or E is generally used for preparing the chlorides listed below from (i) to (v). Answer by writing down the chloride and the letter pertaining to the corresponding method. Each letter is to be used only once.