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A catalyst increases rate of reaction by...

A catalyst increases rate of reaction by

A

decreasing enthalpy

B

decreasing internal energy

C

decreaseing activation energy

D

increasing activation energy

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The correct Answer is:
C
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A catalyst increase rate of reaction by :

A catalyst increases the rate of reaction by :

Assertion : A catalyst increases the rate of reaction without itself undergoing any permanent chemical change. Reason : A catalyst changes the Gibbs energy (Delta G) of the reaction and equilibrium constant of the reaction.

(A) Positive catalyst increases the rate of reaction (R) Catalyst decrease the value of DeltaG^(@)

A : A positive catalyst increases the rate of reaction . R : A positive catalyst alters reaction mechanism and decreases activation energy.

(A) A catalyst increases the rate of areaction. (R)In presence of a catalyst, the activation energy of the reaction increases.

Catalyst increses the rate of reaction

OP TANDON-ADSORPTION AND CATALYSIS-OBJECTIVE QUESTIONS (LEVEL-A)
  1. In Ziegler-Natta polymerisation of ehtylene , the active species are :

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  2. ZSM-5 is used to conver :

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  3. A catalyst increases rate of reaction by

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  4. The role of a catalyst in a reversble reaction is to

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  5. A catalyst in a reversible reaction is to :

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  6. Which of the following is/are not possible in case of autocatalysis?

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  7. Which of the following statements is false ?

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  8. The rate of physisorption increases with

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  9. Which is not correct for physical adsorption?

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  10. According to the adsorption theory of catalysis the speed of the react...

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  11. The chemical equlibrium of a reversible reaction is not influenced by ...

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  12. Identify the gas which is readily adsorbed by activated charcoal?

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  13. Which of the following belong(s) to the family of enzymes?

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  14. Which statement about zeolite is false ?

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  15. Adsorpton of gases on solid surface is generally exothermic because :

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  16. Identify the correct statement regarding enzymes.

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  17. The extent of adsorption of a gas on a solid depends on the :

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  18. Which of the following is true in respect of chemical adsorption?

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  19. If x/m is the mass of adsorbate adsorbed per unit mass of adsorbent, P...

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  20. The efficiency of an enzyme to catalyse a reacrtion is due to its capa...

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