(a)(i) Define ionic bond.

(ii) What type of bond (s) exist (s) in: I. magnesium oxide; II. ammonium ion?

 

(b) Determine the oxidation number of sulphur in Na\(_2\)S\(_2\)O\(_2\).

 

(c) State Faraday's first law.

 

(d) Give one example each of: (i) acid salt; (ii) base salt.

 

(e) Name the type of energy change that occurs in each of the following processes

(i) I\(_{2(s)}\) \(\to\)  I\(_{2(g)}\)

(ii) Cl\(_{(g)}\) + e\(^{-}\) \(\to\) Cl\(^{-_(g)}\)

 

(f) State the effect of each of the following aqueous solutions on litmus paper: (i) Na\(_2\)SO\(_{4(aq)}\) (ii) AlCl\(_{3(aq)}\)

 

(g) Define the term efflorescence.

 

(h) Give two uses of activated charcoal.

 

(i) State one use of each of the following processes in the chemical industry: (i) hydrogenation of vegetable oil; (ii) cracking; (iii) esterification.

 

(j) Calculate the amount of silver deposited in moles when 10920 coulombs of electricity is passed through a solution of a silver salt. [ Faraday constant-- 96500 C mol\(^{-1}\)]