Question

Units of rate constants for first and zero order reactions in terms of molarity $M$ unit are respectively:

• A. ${sec}^{-1},M{sec}^{-1}$
• B. ${sec}^{-1},M$
• C. $M{sec}^{-1},{sec}^{-1}$
• D. $M,{sec}^{-1}$

Answer 1

The correct option is A ${sec}^{-1},M{sec}^{-1}$

$K=\frac{dx}{dt\left[A\right]}$ for Ist order = $se{c}^{-1}$
$K=\frac{dx}{dt}$ for zero order = $mollitr{e}^{-1}se{c}^{-1}$

Hence A is the correct answer.