Question 546:

• JAMB 1988

The thermal decomposition of copper (ll)trioxonitrate (V) yields copper (ll) oxide, oxygen and?

A. Nitrogen (ll) oxide
B. Nitrogen (l) oxide
C. Nitrogen (lV) oxide
D. Nitrogen

Question 547:

• JAMB 1988

Chlorine is produced commmercially by?

A. Electrolysis of dilute hydrochloric acid
B. Electrolysis of brine
C. Neutralization of hydrogen chloride
D. Heating potassium trioxochlorate (V)

Question 548:

• JAMB 1988

Aluminium is extracted commercially from its ore by?

A. Heating aluminium oxide with coke in a furance
B. The electrolysis of fused aluminium oxide in cryolite
C. Treating cryolite with sodium hydroxide solution under prressure
D. Heating sodium aluminium silicate to a high temperature

Question 549:

• JAMB 1988

Given the reactions (i) Fe_(s) + X(NO₃)_2(aq) → Fe(NO₃) + X_(s) (ii) H_2(g) + XO → X + H₂O_(s); X is likely to be?
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A. Copper
B. Zinc
C. Calcium
D. Lead

Question 550:

• JAMB 1988

Crude copper can be purified by the electrolysis of CuSO_4(aq) if?

A. Platinum electrodes are used
B. The crude copper is made the anode of the cell
C. The crude copper is made the cathode of the cell
D. Crude copper electrodes are used