Question

# For a reaction $$I^-+OCl^- \rightarrow IO^- +Cl^-$$, in an aqueous medium, the rate of the reaction is given by $$\dfrac{d[IO^-]}{dt} = K\dfrac{[I^-][OCl^-]}{[OH^-]}$$. The overall order of the reaction is:

A
-1
B
1
C
0
D
2

Solution

## The correct option is B 1The expression for the rate of the reaction is $$\dfrac{d[IO^-]}{dt} = K\dfrac{[I^-][OCl^-]}{[OH^-]}$$.The order with respect to $$I^-,\ OCl^-$$ and $$OH^-$$ are 1, 1 and -1 respectively.The overall order of the reaction is $$1+1-1=1$$.Option B is correct.ChemistryNCERTStandard XII

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