Reaction that follows third order kinetics is:
Correct answer: C. Gas phase oxidation of nitric oxide
- A. Decomposition of nitrogen dioxide
- B. Decomposition of hydrogen iodide
- C. Gas phase oxidation of nitric oxide
- D. Formation of hydrogen iodide
Explanation
Option C is correct as gas phase oxidation of nitric oxide is a third order reaction. The reaction is as follows: 2NO(g) + O2(g) --> 2NO2(g) This reaction is second order with respect to NO and first order with respect to O2, making the overall order to be 3. Option A and D are second order reaction and option B is a zero order reeaction.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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