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Question: Answered & Verified by Expert
In a zero-order reaction, if the initial concentration of the reactant is doubled, the time required for half the reactant to be consumed
ChemistryChemical KineticsKVPYKVPY 2011 (SB/SX)
Options:
  • A increases two-fold
  • B increases four-fold
  • C decreases by half
  • D does not change
Solution:
2475 Upvotes Verified Answer
The correct answer is: increases two-fold
$\begin{array}{l}
\mathrm{K}=\frac{\mathrm{A}_{0}-\mathrm{A}_{\mathrm{t}}}{\mathrm{t}} \\
\mathrm{K}=\frac{\mathrm{A}_{2}}{2 \mathrm{t}_{1 / 2}} \\
\mathrm{t}_{1 / 2}=\frac{\mathrm{A}_{0}}{2 \mathrm{~K}} \quad \text { Zero order }
\end{array}$
$\mathrm{t}_{1 / 2} \propto$ initial concentration so double times

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