- 1(current)
Q. No.The correct statements among the following is:
| (a) | Catalyst provides an alternative pathway to the reaction mechanism |
| (b) | Catalyst raises the activation energy |
| (c) | A catalyst lowers the activation energy |
| (d) | Catalyst alters enthalpy change of the reaction |
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, c) |
Subtopic: Â Catalyst |
 85%
From NCERT
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Match the statements in Column I and Column II :
|
Column I
(Thermodynamic/Kinetic Principle)
|
Column II
(Impact on Reaction Dynamics)
|
||
| A. | Catalyst alters the rate of reaction | 1. | Proper orientation is not always there |
| B. | 2. | By lowering the activation energy | |
| C. | Energetically favorable reactions are sometimes slow | 3. | Total probability is one |
| D. | The area under the Maxwell-Boltzmann curve is constant | 4. | Refers to the fraction of molecules with energy equal to or greater than the activation energy |
Codes:
| A | B | C | D | |
| 1. | 2 | 4 | 1 | 3 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 3 | 4 | 1 | 2 |
Subtopic: Â Catalyst |
 91%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | The enthalpy of reaction remains constant in the presence of a catalyst. |
| Reason (R): | A catalyst participating in the reaction forms a different activated complex and lowers down the activation energy but the difference in energy of the reactant and the product remains the same. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Catalyst |
 78%
From NCERT
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Links
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Consider the following graph:
The point that represents the most probable kinetic energy is:
| 1. | C | 2. | A |
| 3. | B | 4. | None of the above |
Subtopic: Â Catalyst |
 77%
From NCERT
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Hints
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- 1(current)
Q. No.
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