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The rate constant 'k' is 0.693 min-1. The half-life for the first-order reaction will be:

Correct answer: A. 1 min

  • A. 1 min
  • B. 2 min
  • C. 0.693 min
  • D. 4 min

Explanation

For first order reactions, half life is constant, which means that half life is independent of initial concentration. For the first order reactions: t1/2 = 0.693/k t1/2 = 0.693/0.693 t1/2 = 1min

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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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