The unit of rate constant for a zero order reaction is `s^(-1)`.

Options

A. `s^(-1)`
B. `mol L^(-1)s^(-1)`
C. `L mol^(-1)s^(-1)`
D. `L^(2)mol^(-2)s^(-1)`

Answer

B

Explanation

For a general reaction
`aA+bBrarrcC+dD`
rate `=[A]^(x)[B]^(y)`
where `x+y=n=`overall order of the reaction
`K=(Rate)/([A]^(x)[B]^(y))`
`=("Concentration")/(time)xx(1)/(("concentration")^(n))`
Taking unit of concentration, `molL^(-1)` and time, `s` , the unit of rate constant for a zero-order reaction `(n=0)` is
`(molL^(-1))/(2)xx(1)/((molL^(-1))^(0))=molL^(-1)s^(-1)`