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In a first order reaction, the concentra...

In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to hange from 0.1 M to 0.025 M is

A

`7.5` minutes

B

`15` minutes

C

`30` minutes

D

`60` minutes

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The correct Answer is:
C
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AAKASH SERIES-CHEMICAL KINETICS-Objective Exercise - 2
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  2. The half life period of a first order chemical reaction is 6.93 minute...

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  4. The chemical recation 2O(3) to 3O(2) proceeds as follows : O(3)overset...

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  5. 90% of first order process X to Y is completed in a time equals to 99%...

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  6. Based on the following data for a reaction what is its order (Ato prod...

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  7. [A](M)" "[B](M)" ""Initial rate"(Ms^(-1)) 0.4" "0.3" ...

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  8. In the initial cocnentration is reduced to 1/4th of the initial value ...

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  9. If (dx)/(dt)=k[H(3)O^(+)]^(n) and rate becomes 100 times when pH chang...

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  10. The initial concentration of cane sugar is presence of an acid was red...

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  11. 50% completion of a first order reaction takes place in 16 minutes. Th...

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  12. For the process X(g)to products, (order ne 0), rates of disappearance...

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  13. The temperature coefficient of a reaction is 2.5 . If its rate constan...

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  14. A to B , K1= 0.693 sec^(-1) C to D, K2 = 0.693 "min"^(-1) If t1 and t2...

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  15. For 2NH3(g) underset(Delta)overset(Pt)(to) products follows zero orde...

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  16. The time needed for the completion of 2/3 of a 1st order reaction, whe...

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  17. The rate constant of a first order reaction of 0.0693"min"^(-1). What ...

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  18. Thermal decomposition of HI(g) on Gold surface follows Zero order kine...

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  19. A to B and C to D are first order reactions. Ratio of t(99.9%) val...

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  20. For a first order reaction temperature coefficient is 2. If the value ...

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