The reaction which is second order:
Correct answer: B. Formation of FeI2
- A. Decomposition of N2O5
- B. Formation of FeI2
- C. Formation of Glucose in plants
- D. Chlorination of methane in sunlight
Explanation
The correct answer is the formation of FeI2, as it is a second-order reaction where the rate is determined by the concentrations of both iron (Fe) and iodine (I2). For this reaction, the rate equation is Rate = k [Fe] [I2].The decomposition of N2O5 is a first-order reaction, as the rate depends only on the concentration of N2O5. The formation of glucose in plants during photosynthesis is also typically a first-order reaction with respect to CO2. Similarly, the chlorination of methane in sunlight involves a first-order dependency on the concentration of CH4.
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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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