The time for half life period

Question:

The time for half life period of a certain reaction $\mathrm{A} \longrightarrow$ Products is 1 hour, when the initial concentration of the reactant 'A' is $2.0 \mathrm{~mol} \mathrm{~L}-1$, 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. $1 \mathrm{~h}$

  2. $4 \mathrm{~h}$

  3. $0.5 \mathrm{~h}$

  4. $0.29$.


Correct Option: , 4

Solution:

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