Types of Elementary Reaction
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CHXII04:CHEMICAL KINETICS

320618 For a reaction \({\mathrm{A \xrightarrow{k_{1}} B \xrightarrow{k_{2}} C}}\), if the rate of formation of \({\mathrm{B}}\) is set to be zero then the concentration of \({\mathrm{B}}\) is given by

1 \({\mathrm{\left(\mathrm{k}_{1}+\mathrm{k}_{2}\right)[\mathrm{A}]}}\)
2 \({\mathrm{\left(\mathrm{k}_{1} / \mathrm{k}_{2}\right)[\mathrm{A}]}}\)
3 \({\mathrm{\left(k_{1}-k_{2}\right)[A]}}\)
4 \({\mathrm{\mathrm{k}_{1} \mathrm{k}_{2}[A]}}\)
JEE Main - 2024
CHXII04:CHEMICAL KINETICS

320619 In the reversible reaction, \(2{\text{N}}{{\text{O}}_2}\mathop \rightleftharpoons \limits_{{{\text{k}}_{\text{2}}}}^{{{\text{k}}_{\text{1}}}} {{\text{N}}_{\text{2}}}{{\text{O}}_{\text{4}}}\)
the rate of disappearance of \(\mathrm{NO}_{2}\) is equal to

1 \(\frac{{{\rm{2}}{{\rm{k}}_{\rm{1}}}}}{{{{\rm{k}}_{\rm{2}}}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^{\rm{2}}}\)
2 \(2{{\rm{k}}_{\rm{1}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^{\rm{2}}} - 2{{\rm{k}}_{\rm{2}}}\left[ {{\rm{\;}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}} \right]\)
3 \(2{{\rm{k}}_{\rm{1}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^2} - {{\rm{k}}_{\rm{2}}}\left[ {{\rm{\;}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}} \right]\)
4 \(\left( {2{{\rm{k}}_1} - {{\rm{k}}_2}} \right)\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]\)
CHXII04:CHEMICAL KINETICS

320620 For the set of reactions
\({\text{(i) A + B}}\mathop \rightleftharpoons \limits_{{k_2}}^{{k_1}} C,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\text{(ii) C}} + {\text{B}}\xrightarrow{{{{\text{k}}_{\text{3}}}}}{\text{D}}\)
\({{\text{k}}_{\text{1}}}{\text{[A][B]}} - {{\text{k}}_{\text{2}}}{\text{[C]}} - {{\text{k}}_{\text{3}}}{\text{[C][B]}}\) is equal to

1 \(\frac{{ - {\text{d[A]}}}}{{{\text{dt}}}}\)
2 \(\frac{{ - {\text{d[B]}}}}{{{\text{dt}}}}\)
3 \(\frac{{{\text{d[C]}}}}{{{\text{dt}}}}\)
4 \(\frac{{{\text{d[D]}}}}{{{\text{dt}}}}\)
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CHXII04:CHEMICAL KINETICS

320618 For a reaction \({\mathrm{A \xrightarrow{k_{1}} B \xrightarrow{k_{2}} C}}\), if the rate of formation of \({\mathrm{B}}\) is set to be zero then the concentration of \({\mathrm{B}}\) is given by

1 \({\mathrm{\left(\mathrm{k}_{1}+\mathrm{k}_{2}\right)[\mathrm{A}]}}\)
2 \({\mathrm{\left(\mathrm{k}_{1} / \mathrm{k}_{2}\right)[\mathrm{A}]}}\)
3 \({\mathrm{\left(k_{1}-k_{2}\right)[A]}}\)
4 \({\mathrm{\mathrm{k}_{1} \mathrm{k}_{2}[A]}}\)
JEE Main - 2024
CHXII04:CHEMICAL KINETICS

320619 In the reversible reaction, \(2{\text{N}}{{\text{O}}_2}\mathop \rightleftharpoons \limits_{{{\text{k}}_{\text{2}}}}^{{{\text{k}}_{\text{1}}}} {{\text{N}}_{\text{2}}}{{\text{O}}_{\text{4}}}\)
the rate of disappearance of \(\mathrm{NO}_{2}\) is equal to

1 \(\frac{{{\rm{2}}{{\rm{k}}_{\rm{1}}}}}{{{{\rm{k}}_{\rm{2}}}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^{\rm{2}}}\)
2 \(2{{\rm{k}}_{\rm{1}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^{\rm{2}}} - 2{{\rm{k}}_{\rm{2}}}\left[ {{\rm{\;}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}} \right]\)
3 \(2{{\rm{k}}_{\rm{1}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^2} - {{\rm{k}}_{\rm{2}}}\left[ {{\rm{\;}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}} \right]\)
4 \(\left( {2{{\rm{k}}_1} - {{\rm{k}}_2}} \right)\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]\)
CHXII04:CHEMICAL KINETICS

320620 For the set of reactions
\({\text{(i) A + B}}\mathop \rightleftharpoons \limits_{{k_2}}^{{k_1}} C,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\text{(ii) C}} + {\text{B}}\xrightarrow{{{{\text{k}}_{\text{3}}}}}{\text{D}}\)
\({{\text{k}}_{\text{1}}}{\text{[A][B]}} - {{\text{k}}_{\text{2}}}{\text{[C]}} - {{\text{k}}_{\text{3}}}{\text{[C][B]}}\) is equal to

1 \(\frac{{ - {\text{d[A]}}}}{{{\text{dt}}}}\)
2 \(\frac{{ - {\text{d[B]}}}}{{{\text{dt}}}}\)
3 \(\frac{{{\text{d[C]}}}}{{{\text{dt}}}}\)
4 \(\frac{{{\text{d[D]}}}}{{{\text{dt}}}}\)
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CHXII04:CHEMICAL KINETICS

320618 For a reaction \({\mathrm{A \xrightarrow{k_{1}} B \xrightarrow{k_{2}} C}}\), if the rate of formation of \({\mathrm{B}}\) is set to be zero then the concentration of \({\mathrm{B}}\) is given by

1 \({\mathrm{\left(\mathrm{k}_{1}+\mathrm{k}_{2}\right)[\mathrm{A}]}}\)
2 \({\mathrm{\left(\mathrm{k}_{1} / \mathrm{k}_{2}\right)[\mathrm{A}]}}\)
3 \({\mathrm{\left(k_{1}-k_{2}\right)[A]}}\)
4 \({\mathrm{\mathrm{k}_{1} \mathrm{k}_{2}[A]}}\)
JEE Main - 2024
CHXII04:CHEMICAL KINETICS

320619 In the reversible reaction, \(2{\text{N}}{{\text{O}}_2}\mathop \rightleftharpoons \limits_{{{\text{k}}_{\text{2}}}}^{{{\text{k}}_{\text{1}}}} {{\text{N}}_{\text{2}}}{{\text{O}}_{\text{4}}}\)
the rate of disappearance of \(\mathrm{NO}_{2}\) is equal to

1 \(\frac{{{\rm{2}}{{\rm{k}}_{\rm{1}}}}}{{{{\rm{k}}_{\rm{2}}}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^{\rm{2}}}\)
2 \(2{{\rm{k}}_{\rm{1}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^{\rm{2}}} - 2{{\rm{k}}_{\rm{2}}}\left[ {{\rm{\;}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}} \right]\)
3 \(2{{\rm{k}}_{\rm{1}}}{\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]^2} - {{\rm{k}}_{\rm{2}}}\left[ {{\rm{\;}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}} \right]\)
4 \(\left( {2{{\rm{k}}_1} - {{\rm{k}}_2}} \right)\left[ {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right]\)
CHXII04:CHEMICAL KINETICS

320620 For the set of reactions
\({\text{(i) A + B}}\mathop \rightleftharpoons \limits_{{k_2}}^{{k_1}} C,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\text{(ii) C}} + {\text{B}}\xrightarrow{{{{\text{k}}_{\text{3}}}}}{\text{D}}\)
\({{\text{k}}_{\text{1}}}{\text{[A][B]}} - {{\text{k}}_{\text{2}}}{\text{[C]}} - {{\text{k}}_{\text{3}}}{\text{[C][B]}}\) is equal to

1 \(\frac{{ - {\text{d[A]}}}}{{{\text{dt}}}}\)
2 \(\frac{{ - {\text{d[B]}}}}{{{\text{dt}}}}\)
3 \(\frac{{{\text{d[C]}}}}{{{\text{dt}}}}\)
4 \(\frac{{{\text{d[D]}}}}{{{\text{dt}}}}\)
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