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Q. No.Subtopic: Â Catalyst |
 55%
Level 3: 35%-60%
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An exothermic reaction X Y has an activation energy of 30 kJ mol–1. If energy change during
the reaction is –20 kJ mol–1, then the activation energy for the reverse reaction in kJ mol–1 is -
(Integer answer)
1. -50
2. 50
3. 10
4. -10
Subtopic: Â Catalyst |
 70%
Level 2: 60%+
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The activation energy of a reaction in presence of a catalyst is 10 kJ less than the activation energy of a reaction in absence of a catalyst at 300 K.
If \(\xrightarrow[{\large K_\text{absence of catalyst}}]{{\large K_\text{catalyst}}}~=~e^x,\) then the value of 'x' is:
1. 5
2. 7
3. 4
4. 2
If \(\xrightarrow[{\large K_\text{absence of catalyst}}]{{\large K_\text{catalyst}}}~=~e^x,\) then the value of 'x' is:
1. 5
2. 7
3. 4
4. 2
Subtopic: Â Catalyst |
Level 4: Below 35%
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If the ratio of the catalyzed rate \((k_{cat})\) to the uncatalyzed rate \((k_{un})\) is \(10^6\), express the difference in activation energies in terms of the gas constant R and the temperature T.
1. –6.(2.303).RT
2. +6.(2.303).RT
3. –6RT
4. +6RT
1. –6.(2.303).RT
2. +6.(2.303).RT
3. –6RT
4. +6RT
Subtopic: Â Arrhenius Equation |Â Catalyst |
Level 3: 35%-60%
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