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The rate constant of a first order react...

The rate constant of a first order reaction of `0.0693"min"^(-1)`. What is the time (in min) required for reducing an initial concentration of 20 mole `"lit"^(-1)` to 2.5 mole `"lit"^(-1)`?

A

40

B

10

C

20

D

30

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-CHEMICAL KINETICS-OBJECTIVE EXERCISE - 2 (Order, molecularity, Half life)
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  2. The time needed for the completion of 2/3 of a 1st order reaction, whe...

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  6. The half life periods of four reactions labelled by A,B, C & D are 30 ...

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  8. Initial concentration of the reactant is 1.0 M. The concentration beco...

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  9. The product of half life (t(1//2)) and the square of initial concentra...

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  10. For first order reaction t(0.75) is 138.6 sec. Its specific rate const...

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  12. In a first order reaction, 20% reaction is completed in 24 minutes.The...

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  13. A first order reaction is half completed is 45 minutes. How long does ...

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  14. For a first order reaction AtoB the reaction rate at reactant concetra...

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  15. 99% of a first order reaction was completed in 32 in. When wil 99.9% o...

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  16. For a first order reaction with half life of 150 seconds, the time tak...

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  17. A reaction which is of first order w.r.t reactant A has a rate constna...

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  18. 99% of a 1st order reaction completed in 2.303 minutes. What is the ra...

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  19. In the case of a first order reaction, the ratio of the time required ...

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  20. Out og 300 g substance [decomposes as per 1st order], hou much will re...

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