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A catalyst accelerates the reaction, bec...

A catalyst accelerates the reaction, because

A

it brings the reactants closer

B

it lowers the activation energy

C

it changes the heat of reaction

D

it increases the activation energy

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The correct Answer is:
B
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A catalyst increase the rate of reaction because it

A catalyst alters the rate of a reaction by leading of increasing the energy of activation, In Heterogeneus catalysis adrosption mechanism occurs and Hemogeneus. Catalysis intermediate formation occurs. In auto catalysis one of the products acts on catalyst. The DeltaH of a reaction A + B to C is d -20 KJ mol^(-1) . When a catalyst is used. What is DeltaH for the reaction without catalyst (magnitude)

A catalyst increases the rate of a reaction with out changing ______

(A) Presence of catalyst increases the rate of reaction (R ) Presence of catalyst increases the enthalpy of reaction

Assertiojn (A):A catalyst increases that rate of a reaction . ReasonR): In the presence of a catalyst,the activation energy of the reaction increases.

A: A catalyst increases the rate of a reaction. R: In presence of a catalyst, the activation energy of the reaction increases.

(A) Rate of reaction can also increase with the formation of product, if one of the products acts as a catalyst. (R ) A catalyst lowers the activation energy of the reaction

What is the role played by catalyst to alter the rate of reaction? Explain diagramatically.

AAKASH SERIES-CHEMICAL KINETICS-Objective Exercise - 1
  1. The rate of reaction which does not involve gases, does not depend upo...

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  2. The specific rate constant of a reaction depends on the

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  3. A catalyst accelerates the reaction, because

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  4. The unit of rate constant depends on

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  5. The temperature coefficient of a reaction is

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  6. If concentration of reactants is made x times the rate constant k beco...

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  7. The temperature coefficient of most of the reactions lies between

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  8. For a reaction(K((1+10)))/(K((1)))=x. When temperature is increased fr...

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  9. Increase of temperature will increase the reaction rate due to

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  10. The rate constants of a reaction at 300K and 280 K respectively are K(...

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  11. The rate constant K(1) of a reaction is found to be double that of ra...

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  12. The Arrhenius equation expressing the effect of temperature on the rat...

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  13. Activation energy depends on

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  14. A catalyst in a chemical reaction does not change

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  15. In general the rate of a given reaction can be increased by all the fa...

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  16. The effect of temperature on a reaction rate for whilch Ea is zero is ...

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  17. The rate expression gives the relation between rate of reaction and

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  18. In the graph drawn between log K and 1/T, intercept equalst o

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  19. In the Arrhenius equation equation,the Boltzmann factor e^(Ea//RT) rep...

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  20. Activationenergies for different reactions are give below a. Ato prod...

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