A) \[\text{tim}{{\text{e}}^{-1}}\]
B) \[\text{mol}\,{{\text{L}}^{-1}}\,\text{tim}{{\text{e}}^{-1}}\]
C) \[\text{L}\,\text{mol}{{\,}^{-1}}\,\text{tim}{{\text{e}}^{-1}}\]
D) \[{{\text{L}}^{2}}\,\text{mol}{{\,}^{-2}}\,\text{tim}{{\text{e}}^{-1}}\]
Correct Answer: B
Solution :
Rate of a second order reaction \[=\frac{\text{change}\,\text{in}\,\text{concentration}}{\text{time}}\] \[=\frac{\text{mol}\,{{\text{L}}^{-1}}}{\text{time}}\] \[=\text{mol}\,{{\text{L}}^{-1}}\text{tim}{{\text{e}}^{-1}}\] \[\therefore \]The units of rate of a second order reaction is\[\text{mol}\,{{\text{L}}^{-1}}\text{tim}{{\text{e}}^{-1}}\].
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