1.

For a fist order reaction the rate constant is 6.909 min^(-1) . The time taken for 75% conversion in minutes is :

Answer»

`(3)/(2) "LOG"2`
`(2)/(3)` log 3
`(2)/(3)` log 2
`(3)/(2)` log `(3)/(4)`

Solution :(C ) K = 6.909 `min^(-1)`
`t= (2.303)/(6.909)"log" (100)/(25)`
`=(2.303)/(6.909)xx"log" 4`
`= (2.303)/(6.909) xx2 "log" 2 = (2)/(3 ) "log" 2 `


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