The reaction rate in forward direction decreases with the passage of time because:
Correct answer: A. Concentration of reactants decreases
- A. Concentration of reactants decreases
- B. The order of reaction changes
- C. Concentration of product decreases
- D. Temperature of the system changes
Explanation
According to law of mass action, rate of reaction is directly proportional to product of active masses of reactant. During reaction, active masses or concentration of reactants decreases. That is why, rate in forward direction decreases with decrease in concentration of reactants.
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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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