Molecularity and Mechanism of a Reaction
CHXII04:CHEMICAL KINETICS

320561 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute.
Reason :
The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII04:CHEMICAL KINETICS

320562 A chemical reaction proceeds into the following steps
Step I, \(2 \mathrm{~A} \rightleftharpoons \mathrm{X}\) (fast)
Step II, \({\rm{X + B}} \to {\rm{Y(slow)}}\)
Step III, \(Y+B \rightleftharpoons\) Product (fast)
The rate law for the overall reaction is

1 Rate \(=k[A]^{2}\)
2 Rate \(=k[B]^{2}\)
3 Rate \(=k[A][B]\)
4 Rate \(=k[A]^{2}[B]\)
CHXII04:CHEMICAL KINETICS

320563 Assertion :
The order of the reaction
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \)
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) is 1.
Reason :
The molecularity ot this reaction is 2 .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII04:CHEMICAL KINETICS

320564 Consider the following reactions,
\({{\text{O}}_{\text{3}}} \rightleftharpoons {{\text{O}}_{\text{2}}}{\text{ + O( fast )}}{\mkern 1mu} {\mkern 1mu} \)
\({\text{O + }}{{\text{O}}_{\text{3}}} \to {\text{2}}{{\text{O}}_{\text{2}}}{\text{(slow)}}\)
The rate law expression should be

1 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\left[\mathrm{O}_{2}\right]^{-1}\)
2 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]\left[\mathrm{O}_{2}\right]\)
3 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\)
4 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{2}\right]^{-1}\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII04:CHEMICAL KINETICS

320561 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute.
Reason :
The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII04:CHEMICAL KINETICS

320562 A chemical reaction proceeds into the following steps
Step I, \(2 \mathrm{~A} \rightleftharpoons \mathrm{X}\) (fast)
Step II, \({\rm{X + B}} \to {\rm{Y(slow)}}\)
Step III, \(Y+B \rightleftharpoons\) Product (fast)
The rate law for the overall reaction is

1 Rate \(=k[A]^{2}\)
2 Rate \(=k[B]^{2}\)
3 Rate \(=k[A][B]\)
4 Rate \(=k[A]^{2}[B]\)
CHXII04:CHEMICAL KINETICS

320563 Assertion :
The order of the reaction
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \)
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) is 1.
Reason :
The molecularity ot this reaction is 2 .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII04:CHEMICAL KINETICS

320564 Consider the following reactions,
\({{\text{O}}_{\text{3}}} \rightleftharpoons {{\text{O}}_{\text{2}}}{\text{ + O( fast )}}{\mkern 1mu} {\mkern 1mu} \)
\({\text{O + }}{{\text{O}}_{\text{3}}} \to {\text{2}}{{\text{O}}_{\text{2}}}{\text{(slow)}}\)
The rate law expression should be

1 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\left[\mathrm{O}_{2}\right]^{-1}\)
2 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]\left[\mathrm{O}_{2}\right]\)
3 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\)
4 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{2}\right]^{-1}\)
CHXII04:CHEMICAL KINETICS

320561 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute.
Reason :
The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII04:CHEMICAL KINETICS

320562 A chemical reaction proceeds into the following steps
Step I, \(2 \mathrm{~A} \rightleftharpoons \mathrm{X}\) (fast)
Step II, \({\rm{X + B}} \to {\rm{Y(slow)}}\)
Step III, \(Y+B \rightleftharpoons\) Product (fast)
The rate law for the overall reaction is

1 Rate \(=k[A]^{2}\)
2 Rate \(=k[B]^{2}\)
3 Rate \(=k[A][B]\)
4 Rate \(=k[A]^{2}[B]\)
CHXII04:CHEMICAL KINETICS

320563 Assertion :
The order of the reaction
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \)
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) is 1.
Reason :
The molecularity ot this reaction is 2 .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII04:CHEMICAL KINETICS

320564 Consider the following reactions,
\({{\text{O}}_{\text{3}}} \rightleftharpoons {{\text{O}}_{\text{2}}}{\text{ + O( fast )}}{\mkern 1mu} {\mkern 1mu} \)
\({\text{O + }}{{\text{O}}_{\text{3}}} \to {\text{2}}{{\text{O}}_{\text{2}}}{\text{(slow)}}\)
The rate law expression should be

1 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\left[\mathrm{O}_{2}\right]^{-1}\)
2 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]\left[\mathrm{O}_{2}\right]\)
3 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\)
4 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{2}\right]^{-1}\)
CHXII04:CHEMICAL KINETICS

320561 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute.
Reason :
The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII04:CHEMICAL KINETICS

320562 A chemical reaction proceeds into the following steps
Step I, \(2 \mathrm{~A} \rightleftharpoons \mathrm{X}\) (fast)
Step II, \({\rm{X + B}} \to {\rm{Y(slow)}}\)
Step III, \(Y+B \rightleftharpoons\) Product (fast)
The rate law for the overall reaction is

1 Rate \(=k[A]^{2}\)
2 Rate \(=k[B]^{2}\)
3 Rate \(=k[A][B]\)
4 Rate \(=k[A]^{2}[B]\)
CHXII04:CHEMICAL KINETICS

320563 Assertion :
The order of the reaction
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COO}}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to \)
\({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\) is 1.
Reason :
The molecularity ot this reaction is 2 .

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII04:CHEMICAL KINETICS

320564 Consider the following reactions,
\({{\text{O}}_{\text{3}}} \rightleftharpoons {{\text{O}}_{\text{2}}}{\text{ + O( fast )}}{\mkern 1mu} {\mkern 1mu} \)
\({\text{O + }}{{\text{O}}_{\text{3}}} \to {\text{2}}{{\text{O}}_{\text{2}}}{\text{(slow)}}\)
The rate law expression should be

1 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\left[\mathrm{O}_{2}\right]^{-1}\)
2 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]\left[\mathrm{O}_{2}\right]\)
3 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{3}\right]^{2}\)
4 \(\mathrm{r}=\mathrm{k}\left[\mathrm{O}_{2}\right]^{-1}\)