Rates of Chemical Reaction - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 1995

Which of the following equilibria is shifted to the right as a result of an increase in pressure?

A. H_2(g) + I_2(g) 2HI_(g)
B. 2NO_2(g) N₂O_4(g)
C. PCl_5(s) PCl_3(s) + Cl_2(g)
D. 2O_3(g) 3O_2(g)

Question 37:

• JAMB 1995

It can be deduced that the rate of the reaction

A. For bath l is higher than path ll
B. For path ll is higher than path l
C. Is the same for both paths at all temperatures
D. Depends on the values of both x and y at all pressures

Question 38:

• JAMB 1997

If the rate law obtained for a given reaction is rate = k(X)ⁿ (Y)^m, what is the overall order of the reaction?

A. Nm
B. N/m
C. N + m
D. N - m

Question 39:

• JAMB 1998

2X_(g) + Y_(g) → Z_(g): In the equation above, The rate of formation of Z is found to be independent of the concentration of Y and to quadruple when the concentration of X is doubled. The correct equation for the reaction is?

A. R = k (X)(Y)
B. R = K (X) ° (Y)
C. R = K (X) ° (Y) ₂
D. R = K (X) ₂(Y)°

Question 40:

• JAMB 1998

In the diagram above , the activation energy for the backward reaction is

A. +5kJ
B. +15KJ
C. +25KJ
D. +30KJ