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

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Short tricks for Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.

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Syllabus context

Part of Chemical Kinetics in JEE Main Chemistry.

Free sample questions

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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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