Question

For a reaction, $I^{-} + OCl^{-}\to IO^{-} +Cl^{-}$ in an aqueous medium, the rate of reaction is given by $\frac{d\left[IO^{-}\right]}{dt}=k \frac{\left[I^{-}\right]\left[OCl^{-}\right]}{\left[OH^{-}\right]}$ The overall order of reaction is

• A. $-1$
• B. $0$
• C. $1$
• D. $2$

Answer 1

Answer: (C)

$\frac{d\left[IO^{-}\right]}{dt}=k \frac{\left[I^{-}\right]^{1}\left[OCl^{-}\right]^{1}}{\left[OH^{-}\right]^{1}}$
Order of reaction $=1 + 1 -1 = 1$