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)`.