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The rate of the first-order reaction X r...

The rate of the first-order reaction `X rarr` products is `7.5 xx 10^(-4) mol L^(-1) "min"^(-1)`. What will be value of rate constant when the concentration of `X` is `0.5 mol L^(-1)` ?

A

`3.75xx10^(-4) min ^(-1)`

B

`2.5xx10^(-5) min ^(-1)`

C

`0.1xx10^(-4)`

D

`0.3xx10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
C
Rate `=kxx["concentration "]`
` therefore k= ("Rate")/("[concentraion ]")=(7.5xx10^(-4))/(0.5)=1.5xx10^(-3)`
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