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Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units MCQs for JEE

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Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units JEE MCQs on Goodmarks include 7+ multiple-choice questions with correct answers and step-by-step solutions. Attempt free samples below or unlock the full bank with Pro.

Master Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units through exam-style multiple-choice questions. This page features 7+ JEE MCQs covering Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units, each with verified answers and clear explanations.

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Part of Chemical Kinetics in JEE Main Chemistry.

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Q1ChemistryUnit 8: Chemical Kinetics
A reaction A+B→CA+B \rightarrow C is second order with respect to AA and independent of BB The rate expression for the reaction is:
Q2ChemistryUnit 8: Chemical Kinetics
Statement - I : The molecularity of the reaction H2+Br2→2HBr\boldsymbol{H}_{2}+\boldsymbol{B} \boldsymbol{r}_{2} \rightarrow 2 \mathrm{HBr} is 2 Statement - II: The order of this reaction is 3/23 / 2
Q3ChemistryUnit 8: Chemical Kinetics
The choices below are some of the proposed steps of a reaction mechanism. Which step is least likely to be the ratedetermining step of the mechanism?
Q4ChemistryUnit 8: Chemical Kinetics
Which one of the following statements for order of reaction is not correct?
Q5ChemistryUnit 8: Chemical Kinetics
In the hydrolysis of organic chloride in the presence of a large excess of water, RCl+H2O→ROH+HCl\boldsymbol{R C l}+\boldsymbol{H}_{2} \boldsymbol{O} \rightarrow \boldsymbol{R O H}+\boldsymbol{H} \boldsymbol{C l}
Q6ChemistryUnit 8: Chemical Kinetics
For the reaction given below, 2O3(g)→3O2(g)\mathbf{2} \mathbf{O}_{\mathbf{3}}(\mathbf{g}) \rightarrow \mathbf{3} \mathbf{O}_{\mathbf{2}}(\mathbf{g}) Step⁡∣:O3(g)→O2(g)+O(g)\operatorname{Step} \mid: \mathbf{O}_{3}(\mathbf{g}) \rightarrow \mathbf{O}_{2}(\mathbf{g})+\mathbf{O}(\mathbf{g}) Step 2:O3(g)+O→slow 2O2(g)2: \mathrm{O}_{3}(\mathrm{g})+\mathrm{O} \rightarrow^{\text {slow }} 2 \mathrm{O}_{2}(\mathrm{g}) Statement I: The molecularity of the first step is 1 and of the second step is 2 Statement-II: O(g)O(g) is an intermediate and rate of reaction is K[O3]2[O2]−1\mathbf{K}\left[\mathbf{O}_{3}\right]^{2}\left[\mathbf{O}_{2}\right]^{-1} and order of reaction is 1
Q7ChemistryUnit 8: Chemical Kinetics
Which of the following statement is true for the reaction, H2+Br2→2HBr\boldsymbol{H}_{2}+\boldsymbol{B} \boldsymbol{r}_{2} \rightarrow \boldsymbol{2} \boldsymbol{H} \boldsymbol{B} \boldsymbol{r} The rate law is dxdt=k[H2][Br2]1/2\frac{\boldsymbol{d} \boldsymbol{x}}{\boldsymbol{d} \boldsymbol{t}}=\boldsymbol{k}\left[\boldsymbol{H}_{2}\right]\left[\boldsymbol{B} \boldsymbol{r}_{2}\right]^{1 / 2}

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