In a I order reaction A rarr products, t...

In a I order reaction `A rarr` products, the concentration of the reactant decrease to `6.25%` of its initial value in `80` minutes. What is (i) the rate constant and (ii) the rate of the reaction, `100` minutes after the start, if the initial concentration is `0.2 "mole"//"litre"` ?

A

`2.17xx10^(-2)"min"^(-1),3.47xx10^(-4)"mol.litre"^(-1)"min"^(-1)`.

B

`3.465xx10^(-2)"min"^(-1),2.166xx10^(-4) "mol.litre"^(-1) "min"^(-1)`.

C

`3.465xx10^(-3)"min"^(-1),2.17xx10^(-3)"mol.litre"^(-1)"min"^(-1)`.

D

`2.166xx10^(-3)"min"^(-1),2.667xx10^(-4)"mol.litre"^(-1)"min"^(-1)`.

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The correct Answer is:

B

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