Q. No.When the temperature of a reaction increases from 300 K to 310 K, the rate of the reaction doubles. What is the activation energy for this reaction?
\((R=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1} \text { and } \log 2=0.301)\)
1.
\(53.6 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
2.
\(68.6 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
3.
\(59.5 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
4.
\(70.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
If a reaction A + B → C is exothermic to the extent of 30 kJ mol−1 and the forward reaction has an activation energy of 249 kJ mol−1, the activation energy for the reverse reaction in kJ mol-1 will be:
| 1. | 324 | 2. | 279 |
| 3. | 40 | 4. | 100 |
Select the correct option based on statements below:
| Assertion (A): | For elementary reactions, the law of mass action and the rate of law expression are generally the same. |
| Reason (R): | The molecularity of an elementary reaction is always one. |
| 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. |
Select the correct option based on statements below:
| Assertion (A): | At very high temperatures (approaches to infinity), the rate constant becomes equal to the collision frequency. |
| Reason (R): | The collision in which molecules collide with proper orientation is called an ineffective collision. |
| 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. |
Select the correct option based on statements below:
| Assertion (A): | Base catalyzed hydrolysis of ethyl acetate is a first-order reversible reaction. |
| Reason (R): | The order of reaction always depends on the stoichiometry of the reaction. |
| 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. |
Select the correct option based on statements below:
| Assertion (A): | The overall order of reaction is the sum of the power of all the reactants in the rate expression. |
| Reason (R): | There are many higher-order reactions. |
| 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. |
| 1. | 3.2 × 104 s-1 | 2. | 1.6 × 106s-1 |
| 3. | 1.6 × 103 s-1 | 4. | 3.2 × 106 s-1 |
A first-order reaction has a rate constant of 2.303 . The time required for 40 g of this reactant to reduce to 10 g will be
[Given that ]
| 1. | 230.3 s | 2. | 301 s |
| 3. | 2000 s | 4. | 602 s |
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