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JEE Chemistry · Easy

Chemical Kinetics: Half life MCQ

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Half lifeEasyQuestion 720004

Question

For a first-order reaction, the half-life t½ is:
  1. A
    0.693/k
    Correct
  2. B
    1/k[A]₀
  3. C
    2/k
  4. D
    k/0.693

Correct answer

0.693/k

Explanation

For first-order: t½ = ln2/k = 0.693/k. Note that it is independent of initial concentration.

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