Question

In a certain reaction $10\%$ of the reactant decomposes in one hour, $20\%$ in two hours, $30\%$ in three hours and so on. Dimension of the velocity constant (rate constant) are:

• A. $hour{}^{-}1$
• B. $mollitr{e}^{-1}hou{r}^{-1}$
• C. $litremo{l}^{-1}se{c}^{-1}$
• D. $molse{c}^{-1}$

Answer 1

The correct option is B $mollitr{e}^{-1}hou{r}^{-1}$

In a certain reaction 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on. since rate is not dependant on concentration.

This indicates that the reaction is of zero order.
$rate=k[A{]}^0$
Dimension of the velocity constant (rate constant) are
$mollitr{e}^{-1}hou{r}^{-}1$