Rates of Chemical Reaction - Jamb Chemistry Past Questions and Answers

Question 26:

• JAMB 1988

An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?

A. Average velocity of the molecules
B. Number of collisions between the molecules
C. Density of the molecules
D. Free mean path between each molecules and other

Question 27:

• JAMB 1989

The above diagram gives the potential energy profile of the catalyst and uncatalysed reactions of X_(g) + Y_(g) → XY_(g). Deduce the respective activation energies in KJ of the catalysed and uncatalysed reverse reactions: XY(g) → X_(g) + Y_(g)

A. 300, 500
B. 500, 300
C. -300, -500
D. -500, -300

Question 28:

• JAMB 1989

The above diagram gives the potential energy profile of the catalyst and uncatalysed reactions of X_(g) + Y_(g) → XY_(g). Deduce the respective activation energies in KJ of the catalysed and uncatalysed reverse reactions: XY(g) → X_(g) + Y_(g)

A. 300, 500
B. 500, 300
C. -300, -500
D. -500, -300

Question 29:

• JAMB 1990

Use the above graph above to answer this question . CH₃-C = CH \(\frac{Na}{liq NH_3}\)> P, Compound P, in the above reaction, is

A. A
B. B
C. C
D. D

Question 30:

• JAMB 1990

The above reaction is an example of

A. A displacement reaction
B. A neutralization reaction
C. An elimination reaction
D. Saponification