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Which of the following statements is not...

Which of the following statements is not correct ?

A

It catalyses the forward and backward reactions to the same extent

B

It alters `Delta`G for the reaction

C

It is a substance that does not change the equilibrium constant of a reaction

D

It provides an alternate mechanism by reducing activation energy between reactants and products.

Text Solution

Verified by Experts

The correct Answer is:
B
Presence of a catalyst does not alter the AG and AH of a reaction.
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ICSE-CHEMICAL KINETICS-EXERCISE (PART- I (OBJECTIVE QUESRTIONS)B.COMPLE THE FOLLOWING STATEMENTS BY SELECTING THE CORRECT ALTERNATIVE FROM THE CHOICES GIVEN )
  1. A first order reaction is 50% completed in 1.26 xx 10^(14)s. How much ...

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  2. Compounds 'A' and 'B' react according to the following chemical eq...

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  3. Which of the following statements is not correct ?

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  4. The value of rate constant of a pseudo first order reaction

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  5. Consider the reaction A to B. The concentration of both the reactan...

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  6. The time of completion of 90% of a first order reaction is approximate...

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  7. The rate law for the reaction 2N2 O5 to 4NO2 + O2 is

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  8. At any stage of the reaction 3A to2B, the reaction rate +(dB )/(dt) wi...

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  9. For the reaction system : 2NO(g) + O2(g) ------>2NO2(g),volume is sudd...

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  10. In respect of the equation k = Ae^(-Ea //RT) in chemical kinetics, whi...

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  11. The time taken for the completion of 3/4 of a first order reaction is

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  12. For a reaction A+B to C + D, if concentration of A is doubled without ...

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  13. The half-life of a reaction is halved as the initial concentration of ...

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  14. The reaction X to Product follows first order kinetics. In 40 minutes...

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  15. In a first order reaction, the concentration of the reactant decreases...

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  16. The rate equation for the reaction 2A+B to C is found to be : rate = ...

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  17. The rate of first order reaction is 1.5 xx 10^(-2) mol L^(-1) min ^(-1...

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  18. The half-lives of 2 samples are 0.1 and 0.4 seconds. Their initial con...

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  19. The velocity constant of a reaction at 290 K was found to be 3.2 xx 10...

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  20. For a first order reaction A to B the reaction rate at reactant conc...

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