Question

Rate constant has the unit $mo{l}^{-2}{L}^2{s}^{-1}$, then order of reaction is

• A. zero
• B. first
• C. second
• D. third

Answer 1

Answer: (D)

Unit of rate constant for nth order $=mo{l}^{1-n}{L}^{n-1}{s}^{-1}$
For zero order $=mol{L}^{-1}{s}^{-1}$
First order $=s^{-1}$
Second order $=mo{l}^{-1}L{s}^{-1}$
Third order $=mo{l}^{-2}{L}^2{s}^{-1}$