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For the reaction A→B, the rate law expression is rate = k[A]. Which of the following statements is incorrect?
  • a)
    The reaction follows first order kinetics
  • b)
    The t₁∕₂ of reaction depends on initial concentration of reactants
  • c)
    k is constant for the reaction at a constant temperature
  • d)
    The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
For the reaction A→B, the rate law expression is rate = k[A]. Which of...
Explanation:

Dependence of t₁∕₂ on initial concentration:
- The statement that the t₁∕₂ of the reaction depends on the initial concentration of reactants is incorrect.
- In a first-order reaction like the one given (A→B), the half-life of the reaction remains constant regardless of the initial concentration of the reactants.
- The half-life of a first-order reaction is defined as the time it takes for the concentration of the reactant to decrease to half of its initial value.
- The formula for calculating the half-life of a first-order reaction is t₁∕₂ = 0.693/k, where k is the rate constant.

Example:
- For example, if the rate constant k for the reaction A→B is 0.01 s⁻¹, the half-life of the reaction will be t₁∕₂ = 0.693/0.01 = 69.3 seconds.
- This means that regardless of the initial concentration of A, it will take approximately 69.3 seconds for the concentration of A to decrease to half of its initial value in a first-order reaction.

Conclusion:
- Therefore, the half-life of a first-order reaction does not depend on the initial concentration of the reactants, making option 'B' incorrect in this case.
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For the reaction A→B, the rate law expression is rate = k[A]. Which of the following statements is incorrect?a) The reaction follows first order kinetics b) The t₁∕₂ of reaction depends on initial concentration of reactants c) k is constant for the reaction at a constant temperature d) The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction Correct answer is option 'B'. Can you explain this answer?
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For the reaction A→B, the rate law expression is rate = k[A]. Which of the following statements is incorrect?a) The reaction follows first order kinetics b) The t₁∕₂ of reaction depends on initial concentration of reactants c) k is constant for the reaction at a constant temperature d) The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about For the reaction A→B, the rate law expression is rate = k[A]. Which of the following statements is incorrect?a) The reaction follows first order kinetics b) The t₁∕₂ of reaction depends on initial concentration of reactants c) k is constant for the reaction at a constant temperature d) The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the reaction A→B, the rate law expression is rate = k[A]. Which of the following statements is incorrect?a) The reaction follows first order kinetics b) The t₁∕₂ of reaction depends on initial concentration of reactants c) k is constant for the reaction at a constant temperature d) The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction Correct answer is option 'B'. Can you explain this answer?.
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