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The rate constant of a first order react...

The rate constant of a first order reaction is `6.9xx10^(-3)s^(-1)`. How much time will it take to reduce the initial concentration to its `1//8^("th")` value?

A

100 s

B

200 s

C

300 s

D

400 s

Text Solution

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The correct Answer is:
C
300 s
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DISHA PUBLICATION-CHEMICAL KINETICS -EXERCISE 1 : CONCEPT BUILDER (TOPICWISE) (TOPIC 2: Order of Reaction and Half Life Period)
  1. A hypothetical reaction A(2) + B(2) rarr 2AB follows the mechanism as ...

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  2. The time taken for 90% of a first order reaction to be completed is a...

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  3. A substance 'A' decomposes by a first order reaction starting initial...

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  4. Half life of a first order reaction is 4s and the initial concentrati...

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  5. 3A to B+C, it would be a zero order reaction when

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  6. The reaction A toB follows first order reaction. The time taken for 0....

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  7. For a first-order reaction A rarr B the reaction rate at reactant conc...

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  8. For a reaction A + 2B rarr C, rate is given by R = K [A] [B]^(2). The ...

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  9. In a first order reaction, the concentration of the reactant, decrease...

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  10. In a reaction, when the concentration of reactant is increased two ti...

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  11. The rate constant of a first order reaction is 6.9xx10^(-3)s^(-1). How...

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  12. The plot that represents the zero order reaction is:

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  13. For a chemical reaction t(1 // 2) is 2.5 hours at room temperature. H...

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  14. Point out the wrong statement: For a first order reaction

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  15. For a reaction (d x)/(d t) = K[H^(+)]^(n). If pH of reaction medium ch...

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  16. Ethylene is produced by C(4)H(8) overset(Delta)to 2C(2)H(4)  The rat...

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  17. Which one of the following statements for the order of a reaction is i...

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  18. The rate of a first-order reaction is 0.04 mol L^(-1)s^(-1) at 10 sec...

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  19. Mechanism of a hypothetical reaction X(2) + Y(2) rarr 2XY is given b...

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  20. A first order reaction has a specific reaction rate of 10^(-2) sec^(-1...

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