Dependence of Rate on Concentration
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CHXII04:CHEMICAL KINETICS

320159 Which of the following statements about the rate constant \({\rm{k}}\) of a reaction is wrong?

1 It remains unchanged throughout the course of reaction
2 It provides a convenient measure of reaction rate
3 It is expressed in the same unit \({{\rm{(sec)}}^{{\rm{ - 1}}}}\) for all reactions
4 The more rapid the reaction, the larger is the value of \(\mathrm{k}\), the slower the reaction the smaller is its value
CHXII04:CHEMICAL KINETICS

320160 The rate of the first-order reaction \({\rm{X}} \to \) products is \({\rm{7}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\,{\rm{mi}}{{\rm{n}}^{{\rm{ - 1}}}}{\rm{.}}\) What will be the
value of rate constant when the concentration of \({\rm{X}}\,\,{\rm{is}}\,\,{\rm{0}}{\rm{.5}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\)

1 \({\rm{3}}{\rm{.75 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{\rm{\;}}{{\rm{s}}^{{\rm{ - 1}}}}\)
2 \({\rm{2}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
3 \({\rm{1}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
4 \({\rm{8}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
CHXII04:CHEMICAL KINETICS

320161 For the reaction \(2 \mathrm{~A}+\mathrm{B} \rightarrow\) product, rate of the reaction is \(15 \times {10^{ - 2}}{\text{mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{se}}{{\text{c}}^{{\text{ - 1}}}}\). When \(\left( {{\text{[A] = 0}}{\text{.3 mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{and}}\,\,{\text{[B] = 0}}{\text{.05 mol d}}{{\text{m}}^{{\text{ - 3}}}}} \right)\) What is the value of rate constant if reaction is first order in both the reactants?

1 5
2 8
3 10
4 2
MHTCET - 2022
CHXII04:CHEMICAL KINETICS

320162 The unit of rate constant obeying is the rate expression \(\mathrm{r}=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]^{1 / 3}\) is

1 \(\mathrm{mol}^{-4 / 3} \mathrm{~L}^{4 / 3} \mathrm{~s}^{-1}\)
2 \(\mathrm{mol}^{4 / 3} \mathrm{~L}^{-4 / 3} \mathrm{~s}^{-1}\)
3 \(\mathrm{s}^{-1}\)
4 \(\mathrm{mol}^{-2 / 3} \mathrm{~L}^{2 / 3} \mathrm{~s}^{-1}\)
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CHXII04:CHEMICAL KINETICS

320159 Which of the following statements about the rate constant \({\rm{k}}\) of a reaction is wrong?

1 It remains unchanged throughout the course of reaction
2 It provides a convenient measure of reaction rate
3 It is expressed in the same unit \({{\rm{(sec)}}^{{\rm{ - 1}}}}\) for all reactions
4 The more rapid the reaction, the larger is the value of \(\mathrm{k}\), the slower the reaction the smaller is its value
CHXII04:CHEMICAL KINETICS

320160 The rate of the first-order reaction \({\rm{X}} \to \) products is \({\rm{7}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\,{\rm{mi}}{{\rm{n}}^{{\rm{ - 1}}}}{\rm{.}}\) What will be the
value of rate constant when the concentration of \({\rm{X}}\,\,{\rm{is}}\,\,{\rm{0}}{\rm{.5}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\)

1 \({\rm{3}}{\rm{.75 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{\rm{\;}}{{\rm{s}}^{{\rm{ - 1}}}}\)
2 \({\rm{2}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
3 \({\rm{1}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
4 \({\rm{8}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
CHXII04:CHEMICAL KINETICS

320161 For the reaction \(2 \mathrm{~A}+\mathrm{B} \rightarrow\) product, rate of the reaction is \(15 \times {10^{ - 2}}{\text{mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{se}}{{\text{c}}^{{\text{ - 1}}}}\). When \(\left( {{\text{[A] = 0}}{\text{.3 mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{and}}\,\,{\text{[B] = 0}}{\text{.05 mol d}}{{\text{m}}^{{\text{ - 3}}}}} \right)\) What is the value of rate constant if reaction is first order in both the reactants?

1 5
2 8
3 10
4 2
MHTCET - 2022
CHXII04:CHEMICAL KINETICS

320162 The unit of rate constant obeying is the rate expression \(\mathrm{r}=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]^{1 / 3}\) is

1 \(\mathrm{mol}^{-4 / 3} \mathrm{~L}^{4 / 3} \mathrm{~s}^{-1}\)
2 \(\mathrm{mol}^{4 / 3} \mathrm{~L}^{-4 / 3} \mathrm{~s}^{-1}\)
3 \(\mathrm{s}^{-1}\)
4 \(\mathrm{mol}^{-2 / 3} \mathrm{~L}^{2 / 3} \mathrm{~s}^{-1}\)
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CHXII04:CHEMICAL KINETICS

320159 Which of the following statements about the rate constant \({\rm{k}}\) of a reaction is wrong?

1 It remains unchanged throughout the course of reaction
2 It provides a convenient measure of reaction rate
3 It is expressed in the same unit \({{\rm{(sec)}}^{{\rm{ - 1}}}}\) for all reactions
4 The more rapid the reaction, the larger is the value of \(\mathrm{k}\), the slower the reaction the smaller is its value
CHXII04:CHEMICAL KINETICS

320160 The rate of the first-order reaction \({\rm{X}} \to \) products is \({\rm{7}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\,{\rm{mi}}{{\rm{n}}^{{\rm{ - 1}}}}{\rm{.}}\) What will be the
value of rate constant when the concentration of \({\rm{X}}\,\,{\rm{is}}\,\,{\rm{0}}{\rm{.5}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\)

1 \({\rm{3}}{\rm{.75 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{\rm{\;}}{{\rm{s}}^{{\rm{ - 1}}}}\)
2 \({\rm{2}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
3 \({\rm{1}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
4 \({\rm{8}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
CHXII04:CHEMICAL KINETICS

320161 For the reaction \(2 \mathrm{~A}+\mathrm{B} \rightarrow\) product, rate of the reaction is \(15 \times {10^{ - 2}}{\text{mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{se}}{{\text{c}}^{{\text{ - 1}}}}\). When \(\left( {{\text{[A] = 0}}{\text{.3 mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{and}}\,\,{\text{[B] = 0}}{\text{.05 mol d}}{{\text{m}}^{{\text{ - 3}}}}} \right)\) What is the value of rate constant if reaction is first order in both the reactants?

1 5
2 8
3 10
4 2
MHTCET - 2022
CHXII04:CHEMICAL KINETICS

320162 The unit of rate constant obeying is the rate expression \(\mathrm{r}=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]^{1 / 3}\) is

1 \(\mathrm{mol}^{-4 / 3} \mathrm{~L}^{4 / 3} \mathrm{~s}^{-1}\)
2 \(\mathrm{mol}^{4 / 3} \mathrm{~L}^{-4 / 3} \mathrm{~s}^{-1}\)
3 \(\mathrm{s}^{-1}\)
4 \(\mathrm{mol}^{-2 / 3} \mathrm{~L}^{2 / 3} \mathrm{~s}^{-1}\)
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CHXII04:CHEMICAL KINETICS

320159 Which of the following statements about the rate constant \({\rm{k}}\) of a reaction is wrong?

1 It remains unchanged throughout the course of reaction
2 It provides a convenient measure of reaction rate
3 It is expressed in the same unit \({{\rm{(sec)}}^{{\rm{ - 1}}}}\) for all reactions
4 The more rapid the reaction, the larger is the value of \(\mathrm{k}\), the slower the reaction the smaller is its value
CHXII04:CHEMICAL KINETICS

320160 The rate of the first-order reaction \({\rm{X}} \to \) products is \({\rm{7}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\,{\rm{mi}}{{\rm{n}}^{{\rm{ - 1}}}}{\rm{.}}\) What will be the
value of rate constant when the concentration of \({\rm{X}}\,\,{\rm{is}}\,\,{\rm{0}}{\rm{.5}}\,{\rm{mol}}\,\,{{\rm{L}}^{{\rm{ - 1}}}}\)

1 \({\rm{3}}{\rm{.75 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{\rm{\;}}{{\rm{s}}^{{\rm{ - 1}}}}\)
2 \({\rm{2}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 5}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
3 \({\rm{1}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{ - 3}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
4 \({\rm{8}}{\rm{.0 \times 1}}{{\rm{0}}^{{\rm{ - 4}}}}{{\rm{s}}^{{\rm{ - 1}}}}\)
CHXII04:CHEMICAL KINETICS

320161 For the reaction \(2 \mathrm{~A}+\mathrm{B} \rightarrow\) product, rate of the reaction is \(15 \times {10^{ - 2}}{\text{mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{se}}{{\text{c}}^{{\text{ - 1}}}}\). When \(\left( {{\text{[A] = 0}}{\text{.3 mol d}}{{\text{m}}^{{\text{ - 3}}}}{\text{and}}\,\,{\text{[B] = 0}}{\text{.05 mol d}}{{\text{m}}^{{\text{ - 3}}}}} \right)\) What is the value of rate constant if reaction is first order in both the reactants?

1 5
2 8
3 10
4 2
MHTCET - 2022
CHXII04:CHEMICAL KINETICS

320162 The unit of rate constant obeying is the rate expression \(\mathrm{r}=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]^{1 / 3}\) is

1 \(\mathrm{mol}^{-4 / 3} \mathrm{~L}^{4 / 3} \mathrm{~s}^{-1}\)
2 \(\mathrm{mol}^{4 / 3} \mathrm{~L}^{-4 / 3} \mathrm{~s}^{-1}\)
3 \(\mathrm{s}^{-1}\)
4 \(\mathrm{mol}^{-2 / 3} \mathrm{~L}^{2 / 3} \mathrm{~s}^{-1}\)