The reaction rate in forward direction decreases with the passage of time because
Correct answer: A. Concentration of reactants decrease
- A. Concentration of reactants decrease
- B. Concentration of product decreases
- C. The order of reaction changes
- D. Temperature of the system changes
Explanation
The reaction rate in forward direction decreases with the passage of time because the concentration of reactants decreases. As the reaction proceeds, the reactants are consumed and their concentration decreases. This means that there are fewer reactant molecules available to collide and react, which slows down the reaction rate.
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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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