Question

Units of the rate constant of first and zero order reactions in terms of molarity M unit are respectively:

• A. $se{c}^{-1},Mse{c}^{-1}$
• B. $se{c}^{-1},M$
• C. $Mse{c}^{-1},se{c}^{-1}$
• D. $M,se{c}^{-1}$

Answer 1

The correct option is A $se{c}^{-1},Mse{c}^{-1}$

For first order, $M/sec=k\left[M\right].$
$\therefore k=se{c}^{-1}$
For zero order, $M/sec=k[M{]}^0.$
$\therefore k=Mse{c}^{-1}.$