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Attempt either (a) or (b) :
OR
(b) Write the preparation of the following compounds with balanced chemical equation :
(i) $\ce{NaOH}$ by chlor-alkali process
(ii) Baking Soda
(iii) Plaster of Paris
OR
(b) Write the preparation of the following compounds with balanced chemical equation :
(i) $\ce{NaOH}$ by chlor-alkali process
(ii) Baking Soda
(iii) Plaster of Paris
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(b) (i) $\ce{2NaCl(aq) + 2H2O(l) ->[electricity] 2NaOH(aq) + H2(g) + Cl2(g)}$
(ii) $\ce{NaCl + H2O + NH3 + CO2 -> NaHCO3 + NH4Cl}$
(iii) $\ce{CaSO4.2H2O ->[373K] CaSO4.1/2H2O + 1/2H2O}$
(Deduct ½ mark if no/ incorrect balancing in each case)
(ii) $\ce{NaCl + H2O + NH3 + CO2 -> NaHCO3 + NH4Cl}$
(iii) $\ce{CaSO4.2H2O ->[373K] CaSO4.1/2H2O + 1/2H2O}$
(Deduct ½ mark if no/ incorrect balancing in each case)