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CHEMISTRY
A catalyst :...

A catalyst :

A

increasing activation energy

B

decreasing activation energy

C

increasing reactant energy

D

decreasing threshold energy

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Identify the true statement(s) a) A catalyst is chemically unchanged at the end of a reaction b) A catalyst may appear in the kinetic rate equation of the reaction c) A catalyst will not affect the composition of an equilibrium mixture d) A catalyst cannot cause a non-spontaneous (DeltaG gt 0) reaction to proceed

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Read the given passage and answer the questions A substance which alters the rate of chemical reaction without undergoing any change in mass and chemical composition at the end of reaction is called catalyst. It may be noted that catalyst which increases the speed of a reaction is called positive catalyst and catalyst which decrease the speed of reaction is called negative catalyst. The promoters are substances that enhance the activity of catalyst and poisons are the substances which decrease the activity of catalyts. What are a positive catalysts ?

MODERN PUBLICATION-CHEMICAL KINETICS-EXERCISE
  1. Which of the following does not influence the reaction rate?

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  2. Unit of rate constant for zero order reaction is

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  3. A catalyst :

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  4. What is the unit of rate constant for second order reaction ?

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  5. The value of k for a reaction is 2.96xx10^(30)s^-1 , what is the order...

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  6. A reaction was found to be of second order with respect to concentrati...

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  7. What is the unit of rate of reaction ?

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  8. Half life period of a first order reaction is :

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  9. Calculate the half-life of a first order reaction from its rate consta...

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  10. The change in any one of the reactants or products per unit time is ca...

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  11. The rate of a reaction is 1.209 xx10^-4L^2 mol^-2 s^-1. The order of t...

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  12. A larger increase in reaction rate with small rise in temperature is d...

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  13. Discuss the various factors affecting the rates of chemical reactions.

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  14. What is meant by order of a chemical reaction ? The reaction : 2NO2 + ...

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  15. What is meant by order of a chemical reaction ? The reaction : 2NO2 +...

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  16. What is meant by order of a chemical reaction ? The reaction : 2NO2 +...

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  17. Explain with examples the meaning of the terms average rate and instan...

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  18. Consider the rate equation Rate = k[A]^n What is the change of rate th...

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  19. Consider the rate equation Rate = k[A]^n What is the change of rate th...

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  20. Consider the rate equation Rate = k[A]^n What is the change of rate th...

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