Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsSecond & nth Order ReactionsMedium2 minQB

ChemistryMediummultiple choice

Which of the following statements are correct about the half-life?

Answer:

A, B, C, D

Solution:

1. Half-life: $t_{1/2} = 0.693/ k$ → independent of $[A]$

2. Third-order: $t_{1/2} \propto 1/ [A]^{2}$

3. Time for 15/16 reacted→ remaining $[A] = 1/16 [A]_{0}$

$t = \frac{1}{k} ln (\frac{[ A ] _{0}}{[ A ]}) = \frac{1}{k} ln 16 = 4 t_{1/2}$

4. Average life: $τ = 1/ k = 1.44 t_{1/2}$

Answer: (a, b, c, d)

Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:Second & nth Order Reactions

⏱ 2mℹ️ Source: QB

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