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Dinitrogen pentoxide decomposes to NO(2)...

Dinitrogen pentoxide decomposes to `NO_(2)` and `O_(2)` following first order kinetics `N_(2)O_(5)(g) rarr 2NO_(2)+O_(2)(g)`
0.2 mole of `N_(2)O_(5)` was taken in 2L vessel and heated at 200K. The concentrated of `N_(2)O_(5)` is measured at different intervals . Following graphs A and B were obtained from the data.

Slope of straight line in graph 'A' is `-1 .2 xx 10^(2) sec^(-1)` . What is half life of the reaction ?

A

`2.5 xx 10^(-2) s `

B

`2.5 xx 10^(-3)`

C

`12.5 xx 10^(-4)`

D

`2.5 xx 10^(-3) m`

Text Solution

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The correct Answer is:
B
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