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NEET 2020
Exam
NEET
Year
2020
Subject
Chemistry
Chapter
Chemical Kinetics

NEET 2020 · Chemistry · Chemical Kinetics

The half-life for a zero order reaction having 0 . 02M initial...

The half-life for a zero order reaction having 0.02M0 . 02M initial concentration of reactant is 100s100s. The rate constant (in molL−1s−1mol{L}^{- 1}{s}^{- 1}) for the reaction is

Options

  1. A1.0×10−41 . 0 \times {10}^{- 4}
  2. B2.0×10−42 . 0 \times {10}^{- 4}
  3. C2.0×10−32 . 0 \times {10}^{- 3}
  4. D1.0×10−21 . 0 \times {10}^{- 2}

Correct answer

A. 1.0×10−41 . 0 \times {10}^{- 4}

Step-by-step solution

(t1/2)zero=[A]02K{\left({t}_{1/2}\right)}_{\text{zero}} = \dfrac{[ A{]}_{0}}{2K}

100s=0.02M2K100s = \dfrac{0 . 02M}{2K}
K=0.02M2×100=1×10−4molL−1s−1K = \dfrac{0 . 02M}{2 \times 100} = 1 \times {10}^{- 4}mol{L}^{- 1}{s}^{- 1}

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