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The rate of a reaction depends on the concentration of reactants. The rate law for a hypothetical…
The rate of a reaction depends on the concentration of reactants. The rate law for a hypothetical reaction $a\text{A} + b\text{B} \longrightarrow c\text{C} + d\text{D}$ is $\text{rate} = k [\text{A}]^x[\text{B}]^y$ where $x$ and $y$ are calculated experimentally and known as order of reaction. In most cases, the mechanism of a reaction is not straight forward but broken down in simple elementary steps. These steps represent the progress of overall reaction at the molecular level.
Read the passage carefully and answer the questions that follow.
(i)[1.0]
What will be the order of reaction if the unit of $k$ is $\text{mol}^{-2}\text{ L}^2\text{ s}^{-1}$?
(ii)[1.0]
State any one difference between order of reaction and molecularity of reaction.
(iii)[1.0]
For the reaction $2\text{A} \longrightarrow \text{B} + \text{C}$, the rate law is $\text{rate} = k[\text{A}]^{3/2}$. What is the order and molecularity of the reaction?
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From ISC 2025 Chemistry Paper 1, question 1(C).