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Consider the two hypothetical reactions ...

Consider the two hypothetical reactions given below:
`aArarr `products,`k=xmol^-1Lmin^-1`
`bBrarrProducts`,`k=ymin^-1` The half-lives of both the reactions are the same, equal to 1 hr when molar concentration of the reactant is 1.0 M in each case. If these reactions are started at the same time taking 1M of the reactant in each case, the ratio [A]/[B] after 3 hr will be

A

0.5

B

4

C

1

D

2

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Knowledge Check

  • The half life of a first order reaction is 30 min and the initial concentration of the reactant is 0.1 M . If the initial concentration of reactant is doubled ,then the half life of the reaction will be

    A
    1800S
    B
    60 min
    C
    15 min
    D
    900s

  • The half-life of a first order reaction is 30 min and the initial concentration of the reactant is 0.1 M. If the initial concentration of reactant is doubled, then the half-life of the reaction will be

    A
    1800 s
    B
    60 min
    C
    15 min
    D
    900 s

  • For a certain decompoistion, the rate is 0.30 M s^(-1) when the concentration of the reactant is 0.20 M . If the reaction is order, the rate (in M s^(-1) ) when concentration is increased theee times is

    A
    `0.30`
    B
    `0.90`
    C
    `0.60`
    D
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