Question

The unit of rate for a first order reaction is

• A. $L{s}^{-1}$
• B. $mo{l}^{-1}L{s}^{-1}$
• C. $mol{L}^{-1}{s}^{-1}$
• D. $mol{s}^{-1}$

Answer 1

Answer: (C)

Rate of a reaction $=\frac{\text{ change in concentration }}{\text{ time }}$
$\therefore$ units of rate $=\frac{mol/L}{s}=mol{L}^{-1}{s}^{-1}$