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For the reaction , N2O4(g)underset(K2)o...

For the reaction , `N_2O_4(g)underset(K_2)overset(K_1)hArr2NO_2(g)`, the rate of disappearance of `NO_2` will be

A

`(2k_(1))/(k_(2))[NO_(2)]^(2)`

B

`2k_(1) [NO_(2)]^(2)-2K_(2) [N_(2)O_(4)]`

C

`2k_(1)[NO_(2)]^(2) -k_(2) [N_(2)O_(4)]`

D

`(2k_(1)-k_(2))[NO_(2)]`

Text Solution

Verified by Experts

The correct Answer is:
B
`2NO_(2){:(k_(1)),(k_(2)):}N_(2)O_(4)`
In this reaction `NO_(2)` disappears in forward and appears in backward reaction. So rate of disappear once is (consider elementary reaction) `(-d[NO_(2)])/(dt) =2k_(1) [NO_(2)]^(2)-2k_(2)[N_(2)O_(4)]`
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