Question

$2NO+2H_2\to N_2+2H_{2}O$
The above reaction has been studied at $800^{\circ }C$. The related data are given in the table below

Reactio n serial number	Initial pressure of $H_2$ / kPa	Initial Pressu re of NO/ kPa	Initial rat $(\frac{-dp}{dt})/kPa/s)$
1	65.6	40.0	0.033
2	65.6	20.1	0.214
3	38.6	65.6	0.214
4	19.2	16.6	0.106

The order of the reaction with respect to $NO$ is____

Answer 1

Answer: 2

On decreasing pressure of $NO$ by a factor of ' 2 ' the rate of reaction decreases by a factor of '4'.
$\therefore$ Order of reaction w.r.t. ' $NO$ ' $=2$