Temperature Dependence of Reaction, Class 12 Chemistry NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. In the equation k = A . e^-Ea/RT , A is known as

 Boltzmann factor

  Arrhenius factor

 Kinetic factor

 Rate constant

Question 1 of 10

2. If E_f and E_b are the activation energies of the forward and reverse reactions and the reaction is known to be exothermic, then:

  E_f = E_b

 E_f < E_b

  Data insufficient to predict

  E_f > E_b

Question 2 of 10

3. For a first order reaction it is observed that 3.6 x 10^-18 reactant molecules exist in the activated state of a reaction at 300 K. The activation energy of the reaction is:

 250 kJ

 150 kJ

 200 kJ

  100 kJ

Question 3 of 10

4. The effect of temperature on reaction rate is given by

 Arrhenius equation

 Kirchoff’s Equation

  Clauius Claperyron equation

 Gibb’s Helmholtz equation

Question 4 of 10

5. The activation energies of two reactions are given as E_a1= 40 J and E_a2= 80 J, then the relation between their rate constants can be written as:

 A

 B

 C

 D

Question 5 of 10

6. The activation energy of a chemical reaction can be determined by

 Changing concentration of reactants

  Evaluating rate constant at standard temperature

 Evaluating rate constants at two different temperatures

 Evaluating velocities of reaction at two different temperatures

Question 6 of 10

7. The rate constant, activation energy and Arrhenius parameter of a chemical reaction at 25°C are 3.0 x 10^-4 s^-1, 104.4 kJ mol^-1 and 6.0 x 10¹⁴ s^-1 respectively. The value of the rate constant at infinite temperature is is

 Infinity

 2 x 10¹⁸ s^-1

 6.0 x 10¹⁴s^-1

 6.0 x 10³⁰ s^-1

Question 7 of 10

8. The plot of ln k vs 1/T is a straight line. The slope of the graph is:

 Infinity

  -E_a/RT

  ln A

  E_a

Question 8 of 10

9. For a chemical reaction the rate constant is nearly doubled with the rise in temperature by

 100ºC

  10ºC

 50ºC

 273ºC

Question 9 of 10

10. The reactions with low activation energy are

 Slow

 Non-spontaneous

 Fast

 Always spontaneous

Question 10 of 10

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