Dependence of Rate on Temperature
« Previous Topic: Dependence of Rate on Concentration Next Topic: Effect of Catalyst »
For More Updates join with Us
CHXII04:CHEMICAL KINETICS

320257 For an endothermic reaction energy of activation is \({{\rm{E}}_{\rm{a}}}\) and enthalpy of reaction is \({\rm{\Delta H}}\,\,{\rm{(both}}\,\,{\rm{in}}\,\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{\rm{ - }}}{\rm{)}}\). Minimum value of \({{\rm{E}}_{\rm{a}}}\) will be

1 \({\rm{ > \Delta H}}\)
2 \({\rm{ = 0}}\)
3 \({\rm{ < \Delta H}}\)
4 \({\rm{ = \Delta H}}\)
CHXII04:CHEMICAL KINETICS

320258 Assertion :
The overall rate of a reversible reaction may decrease with the increase in temperature.
Reason :
When the activation energy of forward reaction is less than that of backward reaction, then the increase in the rate of backward reaction is more than that of forward reaction on increasing the temperature.

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

320259 Rate of a reaction can be expressed by Arrhenius equation as: \({\text{k = A}}{{\text{e}}^{{\text{ - E/RT}}}}\)
In this equation, \({{\text{e}}^{{\text{ - E/RT}}}}\) represents

1 The fraction of molecules with energy greater than the activation energy of the reaction
2 The energy above which all the colliding molecules will react
3 The energy below which colliding molecules will not react
4 The total energy of the reacting molecules at a temperature, \(\mathrm{T}\)
CHXII04:CHEMICAL KINETICS

320260 The rate constant for a first order reaction at \(300^{\circ} \mathrm{C}\) for which \(\mathrm{E}_{\mathrm{a}}\) is \(35 \mathrm{Kcal}^{\mathrm{mol}^{-1}}\) and frequency constant ' \(A\) ' is \(1.45 \times 10^{11} \mathrm{sec}^{-1}\) is:

1 \(10 \times 10^{-2} \mathrm{~S}^{-1}\)
2 \(5.37 \times 10^{10} \mathrm{~S}^{-1}\)
3 \(5 \times 10^{-4} \mathrm{~S}^{-1}\)
4 \(7.94 \times 10^{-3} \mathrm{~S}^{-1}\)
NEET DIGITAL LIBRARY
CHXII04:CHEMICAL KINETICS

320257 For an endothermic reaction energy of activation is \({{\rm{E}}_{\rm{a}}}\) and enthalpy of reaction is \({\rm{\Delta H}}\,\,{\rm{(both}}\,\,{\rm{in}}\,\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{\rm{ - }}}{\rm{)}}\). Minimum value of \({{\rm{E}}_{\rm{a}}}\) will be

1 \({\rm{ > \Delta H}}\)
2 \({\rm{ = 0}}\)
3 \({\rm{ < \Delta H}}\)
4 \({\rm{ = \Delta H}}\)
CHXII04:CHEMICAL KINETICS

320258 Assertion :
The overall rate of a reversible reaction may decrease with the increase in temperature.
Reason :
When the activation energy of forward reaction is less than that of backward reaction, then the increase in the rate of backward reaction is more than that of forward reaction on increasing the temperature.

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

320259 Rate of a reaction can be expressed by Arrhenius equation as: \({\text{k = A}}{{\text{e}}^{{\text{ - E/RT}}}}\)
In this equation, \({{\text{e}}^{{\text{ - E/RT}}}}\) represents

1 The fraction of molecules with energy greater than the activation energy of the reaction
2 The energy above which all the colliding molecules will react
3 The energy below which colliding molecules will not react
4 The total energy of the reacting molecules at a temperature, \(\mathrm{T}\)
CHXII04:CHEMICAL KINETICS

320260 The rate constant for a first order reaction at \(300^{\circ} \mathrm{C}\) for which \(\mathrm{E}_{\mathrm{a}}\) is \(35 \mathrm{Kcal}^{\mathrm{mol}^{-1}}\) and frequency constant ' \(A\) ' is \(1.45 \times 10^{11} \mathrm{sec}^{-1}\) is:

1 \(10 \times 10^{-2} \mathrm{~S}^{-1}\)
2 \(5.37 \times 10^{10} \mathrm{~S}^{-1}\)
3 \(5 \times 10^{-4} \mathrm{~S}^{-1}\)
4 \(7.94 \times 10^{-3} \mathrm{~S}^{-1}\)
Join With Us for More Updates
CHXII04:CHEMICAL KINETICS

320257 For an endothermic reaction energy of activation is \({{\rm{E}}_{\rm{a}}}\) and enthalpy of reaction is \({\rm{\Delta H}}\,\,{\rm{(both}}\,\,{\rm{in}}\,\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{\rm{ - }}}{\rm{)}}\). Minimum value of \({{\rm{E}}_{\rm{a}}}\) will be

1 \({\rm{ > \Delta H}}\)
2 \({\rm{ = 0}}\)
3 \({\rm{ < \Delta H}}\)
4 \({\rm{ = \Delta H}}\)
CHXII04:CHEMICAL KINETICS

320258 Assertion :
The overall rate of a reversible reaction may decrease with the increase in temperature.
Reason :
When the activation energy of forward reaction is less than that of backward reaction, then the increase in the rate of backward reaction is more than that of forward reaction on increasing the temperature.

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

320259 Rate of a reaction can be expressed by Arrhenius equation as: \({\text{k = A}}{{\text{e}}^{{\text{ - E/RT}}}}\)
In this equation, \({{\text{e}}^{{\text{ - E/RT}}}}\) represents

1 The fraction of molecules with energy greater than the activation energy of the reaction
2 The energy above which all the colliding molecules will react
3 The energy below which colliding molecules will not react
4 The total energy of the reacting molecules at a temperature, \(\mathrm{T}\)
CHXII04:CHEMICAL KINETICS

320260 The rate constant for a first order reaction at \(300^{\circ} \mathrm{C}\) for which \(\mathrm{E}_{\mathrm{a}}\) is \(35 \mathrm{Kcal}^{\mathrm{mol}^{-1}}\) and frequency constant ' \(A\) ' is \(1.45 \times 10^{11} \mathrm{sec}^{-1}\) is:

1 \(10 \times 10^{-2} \mathrm{~S}^{-1}\)
2 \(5.37 \times 10^{10} \mathrm{~S}^{-1}\)
3 \(5 \times 10^{-4} \mathrm{~S}^{-1}\)
4 \(7.94 \times 10^{-3} \mathrm{~S}^{-1}\)
For More Updates join with Us
CHXII04:CHEMICAL KINETICS

320257 For an endothermic reaction energy of activation is \({{\rm{E}}_{\rm{a}}}\) and enthalpy of reaction is \({\rm{\Delta H}}\,\,{\rm{(both}}\,\,{\rm{in}}\,\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{\rm{ - }}}{\rm{)}}\). Minimum value of \({{\rm{E}}_{\rm{a}}}\) will be

1 \({\rm{ > \Delta H}}\)
2 \({\rm{ = 0}}\)
3 \({\rm{ < \Delta H}}\)
4 \({\rm{ = \Delta H}}\)
CHXII04:CHEMICAL KINETICS

320258 Assertion :
The overall rate of a reversible reaction may decrease with the increase in temperature.
Reason :
When the activation energy of forward reaction is less than that of backward reaction, then the increase in the rate of backward reaction is more than that of forward reaction on increasing the temperature.

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

320259 Rate of a reaction can be expressed by Arrhenius equation as: \({\text{k = A}}{{\text{e}}^{{\text{ - E/RT}}}}\)
In this equation, \({{\text{e}}^{{\text{ - E/RT}}}}\) represents

1 The fraction of molecules with energy greater than the activation energy of the reaction
2 The energy above which all the colliding molecules will react
3 The energy below which colliding molecules will not react
4 The total energy of the reacting molecules at a temperature, \(\mathrm{T}\)
CHXII04:CHEMICAL KINETICS

320260 The rate constant for a first order reaction at \(300^{\circ} \mathrm{C}\) for which \(\mathrm{E}_{\mathrm{a}}\) is \(35 \mathrm{Kcal}^{\mathrm{mol}^{-1}}\) and frequency constant ' \(A\) ' is \(1.45 \times 10^{11} \mathrm{sec}^{-1}\) is:

1 \(10 \times 10^{-2} \mathrm{~S}^{-1}\)
2 \(5.37 \times 10^{10} \mathrm{~S}^{-1}\)
3 \(5 \times 10^{-4} \mathrm{~S}^{-1}\)
4 \(7.94 \times 10^{-3} \mathrm{~S}^{-1}\)