The time for half life period of a certain reaction

Question:

The time for half life period of a certain reaction A $\longrightarrow$ Products is 1 hour, when the initial concentration of the reactant ' $\mathrm{A}^{\prime}$ is $2.0 \mathrm{~mol} \mathrm{} \mathrm{L}^{-1}$, How much time does it take for its concentration to come from $0.50$ to $0.25 \mathrm{~mol} \mathrm{} \mathrm{L}^{-1}$ if it is a zero order reaction?

  1. 1 h

  2. 4 h

  3. 0.5 h

  4. 0.29


Correct Option: , 4

Solution:

For zero order reaction

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