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Chemistry · PYQ NEET UG 2018

हिन्दी

When initial concentration of the reactant is doubled, the half-life period of a zero order reaction _______.

  1. is halved
  2. is doubled
  3. is tripled
  4. remains unchanged

Correct answer · Option 2

is doubled

Explanation

For a zero-order reaction, half-life \( t_{1/2} = \frac{[A]_0}{2k} \). Thus, \( t_{1/2} \) is directly proportional to initial concentration \( [A]_0 \), so doubling it doubles the half-life.
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