Question

Which of the following represent the units of rate of reaction?

• A. $mol{L}^{-1}{s}^{-1}$
• B. $mol{L}^{-1}.s$
• C. $mol{L}^{-1}{s}^2$
• D. $molL{s}^{-1}$

Answer 1

The correct option is A $mol{L}^{-1}{s}^{-1}$

Rate of a chemical reaction:
The rate of change of concentration with time of different chemical species taking part in a chemical reaction is known as rate of reaction w.r.t that species
$\text{Rate}=\frac{\Delta C}{\Delta t}$
Here,
$\Delta C=\text{Change in concentration of any species}$
$\Delta t=\text{Time change corresponding to the concentration change}$
$\text{Unit of rate}=\frac{\text{Unit of}\Delta C}{\text{Unit of}\Delta t}=\frac{mol}{L.s}$