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At room temperature, the reaction betwee...

At room temperature, the reaction between `NO` and `O_(2)` to give `NO_(2)` is fast, while that between `CO` and `O_(2)` is slow. It is due to:

A

CO is smallar in size than of NO

B

Co is poisonous

C

the activation energy for the reaction,
`2NO+O_2 to 2NO_2` is less then
`2CO +O_2 to 2CO_2`

D

none

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Reactions having lower energy of activation occurs more fast under similar experimental conditions.
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