1.

Halflifeperiod of first order reaction A rarr productis 6.93 h what is the valueof rate constant ?

Answer»

1.596 `H^(-1)`
0.1`h^(-1)`
4.802 `h^(-1)`
10 `h^(-1)`

Solution :We have the formula for half life of a FIRST order reaction
`t_(1//2)=(0.693)/(k)`
where k= RATE constant
`therefore 6.93 h=(0.693)/(k) rarr k=(0.693)/(6.93h)`
`k=0.1 h^(-1)`


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