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The reaction 2 X → B is a zeroth order reaction.

Question:

The reaction $2 X \rightarrow B$ is a zeroth order reaction. If the initial concentration of $\mathrm{X}$ is $0.2 \mathrm{M}$, the half-life is $6 \mathrm{~h}$. When the initial concentration of $\mathrm{X}$ is $0.5 \mathrm{M}$, the time required to reach its final concentration of $0.2 \mathrm{M}$ will be :-

  1. $18.0 \mathrm{~h}$

  2. $7.2 \mathrm{~h}$

  3. $9.0 \mathrm{~h}$

  4. $12.0 \mathrm{~h}$


Correct Option: 1

Solution:

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