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Chemical Kinetics question

2009 · Q102
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Chemical Kinetics question

2009 · Q102

NEETChemistryChemical KineticsMCQ+4 / −1
Half-life period of a first order reaction is 1386 seconds. The specific rate constant of the reaction is
  1. A
    0.5 ×\times× 10−-−2 s−-−1
  2. B
    0.5 ×\times× 10−-−3 s−-−1
  3. C
    5.0 ×\times× 10−-−2 s−-−1
  4. D
    5.0 ×\times× 10−-−3 s−-−1.
View written solutionFree

Correct answer: B

Specific rate constant

k = 0.693t1/2{{0.693} \over {{t_{1/2}}}}t1/2​0.693​

= 0.6931386{{0.693} \over {1386}}13860.693​

= 0.5 ×\times× 10-3 sec-1

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