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

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  1. 1.Core idea: Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units
  2. 2.Relates to other subtopics in Chemical Kinetics
  3. 3.Rate law, order, molecularity
  4. 4.Zero and first-order integrated forms
  5. 5.Master Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units definitions and standard results
  6. 6.Solve 20 timed MCQs for Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units

Syllabus context

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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