Rate of Chemical 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. A foreign substance that increase the speed of a chemical reaction is called

  promotor

 catalyst

 moderator

 inhibitor

Question 1 of 10

2. What will be the value of instantaneous rate of reaction from the graph?

 r_inst = 1/ Slope

  r_inst = Slope

  r_inst = – Slope

  r_inst = – 1/ Slope

Question 2 of 10

3. In a chemical reaction, x + 2 y → z, if the rate of appearance of z is 0.50 moles per litre per hour, then the rate of disappearance of y is

 A

 B

 C

 D

Question 3 of 10

4. What will be the value of instantaneous rate of reaction from the graph?

  r_inst = Slope

  r_inst = -1/ Slope

  r_inst = 1/ Slope

  r_inst = – Slope

Question 4 of 10

5. The following graph is plotted as time on the x – axis and concentration of A on the y – axis. Identify A.

 Catalyst

  Product

 Reactant

  Promoter

Question 5 of 10

6. Identify the INCORRECT statement.

 The rate of a typical reaction doubles with a 10° C rise in temperature.

 The reaction mechanism is a step-by-step pathway by which reaction occurs.

 The overall rate of reaction is determined by the rate of the fastest elementary step.

  The reaction mechanism is typically a series of elementary reaction steps.

Question 6 of 10

7. For the reaction . The variation of the concentration of the products is given by curve

 Y

  W

  Z

  X

Question 7 of 10

8. The term in the rate expression refers to the:

  Increase in concentration of the reactants

  Average rate of the reaction

 Instantaneous rate of the reaction

  Concentration of the reactants

Question 8 of 10

9. Instantaneous reaction expresses

 Rate at particular moment of time

 Pressure at particular time

 Speed at particular time

  Concentration at particular time

Question 9 of 10

10. Identify A in the given diagram.

 Order of reaction

 Average rate of reaction

 Concentration of the catalyst

 Instantaneous rate of reaction

Question 10 of 10

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