Electrolysis - Chemistry Jamb Past Questions and Answers

Question 46 :

• JAMB 1995

2CL^-_(aq) → CI_2(g) + 2e^-(aq). The above half-cell reaction occuring at the anode during the electrolysis of dilute ZnCI₂ solution is?

A. Ionization
B. Oxidation
C. Reduction
D. Recombination

Question 47 :

• JAMB 1995

The arrangement above can be used for the collection of

A. Sulphur (IV) oxide
B. Ammonia
C. Hydrogen chloride
D. Nitrogen

Question 48 :

• JAMB 1997

When platinum electrodes are used during the electrolysis of copper (ll) tetraoxosulphate (lV) solution, the solution gets progressively?

A. Acidic
B. Basic
C. Neutral
D. Amphoteric

Question 49 :

• JAMB 1997

How many Faraday of electricity are required to deposit 0.20 mole of nickel, if 0.10 Faraday of electricity deposited 2.98g of nickel during electrolysis of its aqueous solution?
(Ni = 58.7, 1F = 96 500 C mol^-)

A. 0.20
B. 0.30
C. 0.40
D. 0.50

Question 50 :

• JAMB 1998

8.0 g of an element X react with an excess of copper (ll) tetraoxosulphate (lV) solution to deposit 21.3 g of copper. The correct equation for the reaction is?
(Cu = 64).

A. X_(s) + CuSO_4(aq) → Cu_(s) + XSO_4(aq)
B. X_(s) + 2CuSO_4(aq) → 2Cu_(s) + X(SO₄)_2(aq)
C. 2X_(s) + CuSO_4(aq) → Cu_(s) + X₂SO_4(aq)
D. 2X_(s) + 3CuSO_4(aq) → 3Cu_(s) + X₂(SO₄)_3(aq)