| 1. \[2NO\xrightarrow[{}]{{}}{{N}_{2}}+{{O}_{2}}\] |
| 2. \[3{{O}_{2}}\xrightarrow[{}]{{}}2{{O}_{3}}\] |
| 3. \[{{N}_{2}}{{O}_{3}}\xrightarrow[{}]{{}}NO+N{{O}_{2}}\] |
| 4. \[{{H}_{2}}+{{I}_{2}}\xrightarrow[{}]{{}}2HI\] |
A) 3 only
B) 1 and 3
C) 1 and 4
D) 3 and 4
E) 1, 2 and 3
Correct Answer: C
Solution :
\[2NO\xrightarrow{{}}{{N}_{2}}+{{O}_{2}}\] rate\[=k{{[NO]}^{2}}\] Hence, order of reaction is 2. \[{{H}_{2}}+{{I}_{2}}\xrightarrow[{}]{{}}2HI\] rate\[=k[{{H}_{2}}][{{I}_{2}}]\] Hence, order of reaction is \[(1+1)=2\] Therefore, these reaction are most likely to be elementary reaction that occur in one step.
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