This Chemical Kinetics Exam Questions With Answers (Temperature Dependence of the Rate of a Reaction) are the most important part of various entrance exams including NEET, JEE, AIIMS. This article provides a list of important questions on Chemical Kinetics based on Temperature Dependence of the Rate of a Reaction for NEET, AIIMS, JEE and other competitive exams.
Chemical Kinetics Exam Questions With Answers (Temperature Dependence of the Rate of a Reaction)
1. What happens to the peak of the curve in the Maxwell-Boltzmann distribution graph if temperature increases?
a) Shifts forward and upward
b) Shifts forward and downward
c) Shifts backward and upward
d) Shifts backward and downward
Answer: Shifts forward and downward
2. Which of the following is the correct Arrhenius equation?
a) k = A eEa/RT
b) k = A eEa/T
c) k = A eEa/R
d) k = A e-Ea/RT
Answer: k = A e-Ea/RT
3. Which of the following represents the Boltzmann factor?
4. What is R in the equation k = Ae-Ea/RT?
a) R = 8.314 J K-1 mol-1
b) R = 3.184 J K-1 mol-1
c) R = 4.318 J K-1 mol-1
d) R = 1.438 J K-1 mol-1
Answer: R = 8.314 J K-1 mol-1
5. The activation energy of a reaction is 50 kJ mol-1 and the value of rate constant at 300 K is 2.5×10-5 sec-1. What is the value of the frequency factor, A?
a) 4228.53 s-1
b) 3829.69 s-1
c) 7596.45 s-1
d) 6565.35 s-1
Answer: 7596.45 s-1
6. What is the value of rate constant k if the value of the activation energy Ea and the frequency factor A are 49 kJ / mol and 9 × 1010 s-1 respectively? (T = 313 K)
a) 6 × 102 s-1
b) 9 × 102 s-1
c) 6 × 10-2 s-1
d) 3 × 102 s-1
Answer: 6 × 102 s-1
7. The rate constant of a reaction is 6 × 10-3 s-1 at 50° and 9 × 10-3 s-1 at 100° C. Calculate the energy of activation of the reaction.
a) 6.123 kJ mol-1
b) 8.124 kJ mol-1
c) 12.357 kJ mol-1
d) 18.256 kJ mol-1
Answer: 6 × 102 s-1
8. The rate of a reaction depends on the temperature.
9. Which of the following is the correct expression for the temperature coefficient (n)?
a) n = Rate constant at T + 10°/Rate constant at T°
b) n = Rate constant at T + 20°/Rate constant at T°
c) n = Rate constant at T + 30°/Rate constant at T°
d)n = Rate constant at T + 40°/Rate constant at T°
Answer: n = Rate constant at T + 10°/Rate constant at T°
10. The rate of reaction increases with a rise in temperature.