Jamb Chemistry Past Questions and Answers

Question 1526:

• JAMB 2009

A catalyst increase the rate of a chemical reaction by providing a path that

A. Raise the activiation energy
B. Increase the temperature
C. Lowers the activation energy
D. Increase the concentration

Question 1527:

• JAMB 2009

CuO_(s) + H_2(g) ↔ Cu_(s) + H₂O_(l)
What is the effect of increasing the pressure on the equilibrium reaction above?

A. The equilibrium is shifted to the left
B. The equilibrium is shifted to the right
C. There is no effect
D. More H_2(g) is produced

Question 1528:

• JAMB 2009

The equilibrium of an endothermic reaction which proceeds with an increase in volume can be shifted in the reverse direction by

A. Increasing the temperature and decreasing the pressure
B. Increasing the pressure and increasing the temperature
C. Decreasing the temperature and increasing the pressure
D. Decreasing the pressure and decreasing the temperature

Question 1529:

• JAMB 2009

The oxidation of ammonia in excess air produces

A. NO
B. N₂O
C. NO₂
D. N₂O₄

Question 1530:

• JAMB 2009

Hydrogen sulphide gas can act as

A. An oxidizing agent
B. A dehydrating agent
C. A bleaching agent
D. A precipitating agent