1.

(a) 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:(i) Sodium sulphate(ii) Copper sulphate(iii) Iron (II) sulphate(iv) Zinc carbonate Dilute sulphuric acid Copper Iron Sodium, Zinc Copper carbonate Sodium carbonate (b) From the formulae 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.(i) An acid salt.(ii) An insoluble chloride.(iii) On treating with concentrated sulphuric acid, this salt changes from blue to white.(iv) On heating this salt changes from green to black.(v) This salt gives nitrogen dioxide on heating.

Answer» (a) 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:

(i) Sodium sulphate

(ii) Copper sulphate

(iii) Iron (II) sulphate

(iv) Zinc carbonate








Dilute sulphuric acid



 Copper

Iron

Sodium, Zinc		 Copper carbonate

Sodium carbonate

(b) From the formulae 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.

(i) An acid salt.

(ii) An insoluble chloride.

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

(iv) On heating this salt changes from green to black.

(v) This salt gives nitrogen dioxide on heating.


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