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In a first order reaction, 75% of the re...

In a first order reaction, `75%` of the reactants disappeared in `1.386 hr`. What is the rate constant ?

A

`3.6xx10^(-3) s^(-1)`

B

`2.7xx10^(-4) s^(-1)`

C

`72xx10^(-3) s^(-1)`

D

`1.8xx10^(-3) s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Apply the equation `k = (2.303)/(t)"log"(a)/(a-x)`
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DINESH PUBLICATION-RATES OF REACTIONS AND CHEMICAL KINETICS-Revision Question
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  2. Which of the following statement about the catalyst is/are true?

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  3. In a first order reaction, 75% of the reactants disappeared in 1.386 h...

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  4. A substance ''A'' decomposes in solution following the first order kin...

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  5. Half life period of 2 nd order reaction is

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  6. The oxidation of oxalic acid by acidified KMnO(4) is an example of au...

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  7. Diazonium salt decomposes as C(6)H(5)N(2)^(+)Cl^(-) rarr C(6)H(5)Cl ...

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  8. The hydrolysis of ester in alkaline medium is a

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  9. The conversion of A rarr B follows second-order kinetics. Doubling the...

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  10. The rate constant for a first order reaction whose half life is 480 se...

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  11. Select the law that corresponds to data shown for the following reacti...

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  12. The reaction 2H(2)O(2) rarr 2H(2)O+O(2) is r=k[H(2)O(2)]

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  13. A chemical reaction has catalyst X. Hence X

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  14. The raction 2FeCl(3) + SnCl(2) rarr 2FeCl(2) + SnCl(4) is an example ...

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  15. The phenomenon of emission of visible light as a result of chemical ch...

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  16. Rate constant in case of first order reaction is

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  17. For a zero order reaction A rarr B, t(1//2) is (k is rate constant)

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  18. For a chemical reaction A rarr B, it is found that the rate of reacti...

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  19. For the first order reaction with rate contant k, which expression giv...

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  20. The rate constant is given by the equation k = P.Ze^(-E//RT). Which fa...

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