1.

In a first order reaction x rarry , if k is the rate constant and the initial concentration of the reactant x is 0.1 M , then , the half life is ...........

Answer»

`((log2)/K)`
`((0.693)/((0.1)k)`
`((ln2)/k)`
none of these

SOLUTION :`k=(1/t)LN(([A_0])/([A]))`
`[A_0]=0.1,[A]=0.05`
`k=(1/t_(1//2))ln((0.1)/(0.05))`
`k=(1/(t_1//2))ln(2)impliest_(1//2)=(ln(2))/k`


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