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Define rate contant (k) ?...

Define rate contant (k) ?

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Rate constant : It is deffined as the rate of reactin when the molar concentration of each reactant is taken as unity.
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Knowledge Check

  • A reaction takes place in three rate determining steps having rate constants K_(1), K_(2), K_(3) respectively. The overall rate constant K=(K_(1)K_(3))/K_(2) . If energy of activations for the three steps are respectively 10, 20, 40 kJ . The overall energy of activation is:

    A
    `30 kJ`
    B
    `20 kJ`
    C
    `10 kJ`
    D
    `70 kJ`

  • A reaction rate contant doubles between 300 and 310 k. By which of the following factors does the rate constant increases between 400-410 K.

    A
    3.39
    B
    2
    C
    1.48
    D
    1.1

  • For the first order reaction with rate contant k , which expression gives the half life period ? (Initail conc. = a)

    A
    `(l n2)/(ka)`
    B
    `(1)/(ka)`
    C
    `(0.693)/(k)`
    D
    `(3)/(2ka^(2))`

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    The rate of a certain reaction increases by 2.3 times when the temperature is raised form 300K to 310 K . If k is the rate constant at 300K, then the rate constant at 310 K will be equal to

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