Introduction to Chemical Kinetics - Chapter No 8

Right Answers have been shown below in red color.

1. The branch of chemistry that deals with the study of the rate of reaction and mechanism are called __________.

a) Chemical kinetics
b) Chemical reaction
c) Concentration reaction
d) None of these

2. The change in concentration of reactants or products per unit time, is called ______.

a) Acceleration
b) Rate of reaction
c) Concentration of reaction
d) None of these

3. During the passage of time, the concentration of product ________.

a) Decreases
b) Null
c) Full
d) Increases

4. Physical and ___________ methods are the two main methods for the determination of reaction rate.

a) Historical
b) Chemical
c) Tangent
d) Velocity

5. In the chemical method, the concentration of reactants or products is measured with the interval of __________.

a) Velocity
b) Volume
c) Pressure
d) Time

6. The rate of reaction depends upon only one factor that is __________.

a) Temperature
b) Water
c) Fire
d) None of these

7. The factor affects the rate of chemical reaction is ______________.

a) Heat
b) Catalyst
c) Energy
d) None of these

8. The rate of a chemical reaction is proportional to the molar _____ of reacting substances.

a) Concentrations
b) Molecules
c) Energy
d) Volume

9. A catalyst is a substance that is not consumed in a reaction but ________ the rate of reaction.

a) changes
b) Homogeneous
c) Greater
d) Catalyst

10. Catalytic reactions are divided into ________ main types.

a) Three
b) Two
c) Five
d) Four

11. The substance, which slows down a reaction, is called _________.

a) Inhibitor
b) Reactant
c) Rate of law
d) None of these

12. Potassium is poisoned by ___________.

a) Inhibitors
b) Zinc
c) Arsenic
d) Calories

13. The change in concentration of reactants or products per unit time is called.

a) Reaction rate
b) Rate constant
c) Diffusion
d) Chemical kinetic

14. For a reaction system the minimum amount of energy that molecules must have not to form an activated complete is called.

a) Activation energy
b) Ionization energy
c) Reaction energy
d) None of the above

15. The relationship between the rate of reaction and masses (molar concentration) of reacting substance is summarized as.

a) Law of mass action
b) Le-Chatelier principle
c) Charle’s law
d) Ideal gas law

16. The energy of activation is usually expressed in.

a) Joules
b) Calories.
c) Ergs
d) None of the above

17. When catalyst and reactants are present in the same phase, the catalyst is called.

a) Homogeneous catalyst
b) Heterogeneous
c) Organic catalyst
d) None of the above

18. The main function of a catalyst is to.

a) Lower of activation energy
b) Lower temperature
c) Increase in activation energy
d) Lower pressure

19. that substance that make catalyst more effective.

a) Accelerator
b) Inhibitors
c) Promoter
d) None of the above

20. The reaction which may proceed slowly with a measurable rate is called.

a) Slow reaction
b) Fast reaction
c) Moderate reaction
d) None of the above

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