Conisder the following elementary reaction,
`2A + B + C rarr` Products. All reactants are present in the gaseous state and reactant `C` is taken in excess.
What is the unit of rate constant of the reaction?

Options

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

Answer

D

Explanation

Order of reaction `=3`
Units of third order reaction
`=[Conc]^(1+n)=[Conc]^(1-3)= mol^(-2)L^(2) time^(-1)`