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Which of the following statement (s) is/...

Which of the following statement `(s)` is/are correct

A

The rate constant for the reaction
`2N_(2)O_(5) rarr 4NO_(2)+O_(2)`, is `3.0 xx 10^(-5) s^(-1)`. If the rate is `2.40 xx 10^(-5) mol L^(-1) s^(-1)`, then the concentration of `N_(2)O_(5) = 0.8 mol L^(-1)`.

B

In the intensity equation, `k = A exp (-E//RT)`. A may be termed as the rate constant at very low temperature.

C

If `I` is the intensity of absorbed light and `c` is the concentration of `AB` for the photochemical process `AB+hv rarr AB^(**)`, the rate of formation of `AB^(**)` is diretly proportional to `I^(2)`.

D

The rate constant, the activation energy, and the Arrhenius parameter of a chemical reaction at `25^(@)C` are `3.0 xx 10^(-4) s^(-1)`, `104.4 kJ mol^(-1)`, and `6.0 xx 10^(14) s^(-1)`, respectively. The value of the rate constant as `T rarr oo` is `6.0 xx 10^(14) s^(-1)`.

Text Solution

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The correct Answer is:
A, D

(a) `r = k[N_(2)O_(5)]`
`2.40 xx 10^(-5) M s^(-1) = (3.0 xx 10^(-5) s^(-1))[N_(2)O_(5)]`
`:. [N_(2)O_(5)] = 0.80 M`
(b) At very high temperature or zero energy of activation.
(c ) Directly proportional to `I`.
(d) According to Arrhenius equation,
`k = Ae^(-Ea//RT)`
As `T rarr oo, :. K = A`
Hence, `A = 6.0 xx 10^(14) s^(-1)`
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