1.

Consider the reaction, @A+B to products. When concentration of B alone was doubled the half life did not change. When the concentraction of A alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is

Answer»

`s^(-1)`
`L*MOL^(-1)*s^(-)`
no units
`mol*L^(-)*s^(-)`

Solution :Since DOUBLING the concentration of B does not change half-life, the REACTION is of ORDER w.r.t B
Order of reaction with respect to A=1 because of reaction doubles when concentration of A is doubled keeping concentration of B constant.
`therefore` Order of reaction=1+1=2 and units of second order reaction are `L*mol^(-1)*sec^(-1)`.


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