Jamb Chemistry 2007 Past Questions and Answers

Question 16:

• JAMB 2007

What happens when zinc rod is immersed in copper (II) tetraoxosulphate (VI) solution/

A. The blue colour of the solution disappears
B. Electrons flow from copper to zinc
C. The zinc rod remain undissolved
D. The copper generate more copper ions

Question 17:

• JAMB 2007

C₂H_4(g) + H_2(g) → C₂H_6(g) ΔH = -137kJ mol_-1
The reaction represented above is

A. Exothermic
B. Spontaneous
C. Endothermic
D. In equilibrium

Question 18:

• JAMB 2007

How long would it take to deposit 0.08g of copper from CuCl₂ solution by passing a current of 0.5A?
[Cu = 64, F = 96500 C mol_-1]

A. 6 mins
B. 8 mins
C. 24 mins
D. 48 mins

Question 19:

• JAMB 2007

tartaric acid is used industrially to

A. Make baking powder
B. Make fruit juices
C. Remove rust
D. Dry substance

Question 20:

• JAMB 2007

The salt formed from strong acid and a strong base is

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