Rates of Chemical Reaction - Jamb Chemistry Past Questions and Answers

Question 66:

• JAMB 2012

An increase in the pressure exerted on gas at a constant temperature results in

A. A decrease in the number of effective collisions
B. A decrease in volume
C. An increase in the average intermolecular distance
D. An increase in volume

Question 67:

• JAMB 2013

The rate of diffusion of a gas Y is twice that of Z If the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z

A. 32
B. 4
C. 8
D. 16

Question 68:

• JAMB 2013

In the graph above, the activation energy of the catalyzed reaction is

A. 100KJ
B. 300KJ
C. 250KJ
D. 200KJ

Question 69:

• JAMB 2014

In a chemical reaction, the change in concentration of a reactant with time is

A. Entropy of reaction
B. Enthalpy of reaction
C. Rate of reaction
D. Order of reaction

Question 70:

• JAMB 2014

CH₃COOC₂H₅(1) + H₂O₍₁₎ ⇌ CH ₃COOH _(aq) + C ₂H ₅OH _(aq)
The purpose of H⁺ in the reaction above is to

A. Increase the yield of products
B. Maintain the solution at a constant PH
C. Increase the rate of the hydrolysis
D. Decrease the rate of the reverse reaction