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Q. No.Which plot of In k vs \(\frac{\text{I}}{\text{T}}\) is consistent with Arrhenius equation?
1.
2.
3.
4.
Subtopic: Arrhenius Equation |
68%
Level 2: 60%+
NEET - 2024
Hints
The rate of a reaction quadruples when temperature changes from 27°C to 57°C. Calculate the energy of activation.
Given R = 8.314 J K–1 mol–1, log 4 = 0.6021
Given R = 8.314 J K–1 mol–1, log 4 = 0.6021
| 1. | 380.4 kJ/mol | 2. | 3.80 kJ/mol |
| 3. | 3804 kJ/mol | 4. | 38.04 kJ/mol |
Subtopic: Arrhenius Equation |
57%
Level 3: 35%-60%
NEET - 2024
Hints
Which of the following expression is correct for the reaction given below?
\(2 \mathrm{HI}_{(g)} \rightarrow \mathrm{H}_{2(g)}+\mathrm{I}_{2(g)}\)
\(2 \mathrm{HI}_{(g)} \rightarrow \mathrm{H}_{2(g)}+\mathrm{I}_{2(g)}\)
| 1. | \(\dfrac{-\Delta[\mathrm{H}I]}{\Delta t}=\dfrac{2 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\) | 2. | \(\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4\Delta\left[\mathrm{I}_2\right]}{\Delta t}\) |
| 3. | \(\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\) | 4. | \( \dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{\Delta\left[\mathrm{H}_2\right]}{\Delta t}\) |
Subtopic: Definition, Rate Constant, Rate Law |
89%
Level 1: 80%+
NEET - 2024
Hints
Effective collisions are known to possess:
A: Energy greater than the threshold energy.
B: Breaking of old bonds in the reactant.
C: Formation of a new bond in the product.
D: High activation energy.
E: Proper orientation.
Choose the correct answer from the options given below:
A: Energy greater than the threshold energy.
B: Breaking of old bonds in the reactant.
C: Formation of a new bond in the product.
D: High activation energy.
E: Proper orientation.
Choose the correct answer from the options given below:
| 1. | A, B, C, D only | 2. | A, B, C, E only |
| 3. | A, C, D, E only | 4. | B, C, D, E only |
Subtopic: Arrhenius Equation |
72%
Level 2: 60%+
NEET - 2024
Hints
What is the rate constant for a reaction if the time taken by the first-order decomposition of \(\text{SO}_2\text{Cl}_2\) to decompose to 40% is 560 seconds?
[Given: log 2.5 = 0.3979]
[Given: log 2.5 = 0.3979]
| 1. | \(2.726 \times 10^{-5} \mathrm{~min}^{-1}\) | 2. | \(2.276 \times 10^{-5} \mathrm{~min}^{-1}\) |
| 3. | \(2.216 \times 10^{-5} \mathrm{~min}^{-1}\) | 4. | None of the above |
Subtopic: First Order Reaction Kinetics |
Level 3: 35%-60%
NEET - 2024
Hints
Activation energy of any chemical reaction can be calculated if one knows the value of:
| 1. | Probability of collision. |
| 2. | Orientation of reactant molecules during collision. |
| 3. | Rate constant at two different temperatures. |
| 4. | Rate constant at standard temperature. |
Subtopic: Arrhenius Equation |
69%
Level 2: 60%+
NEET - 2024
Hints
The following data is for a reaction between reactants A and B:
The order of the reaction with respect to A and B, respectively are:
| Rate mol \(L^{-1}s^{-1}\) |
[A] | [B] |
| \(2 \times10^{-3}\) | 0.1 M | 0.1 M |
| \(4 \times10^{-3}\) | 0.2 M | 0.1 M |
| \(1.6 \times10^{-2}\) | 0.2 M | 0.2 M |
| 1. | 1, 0 | 2. | 0, 1 |
| 3. | 1, 2 | 4. | 2, 1 |
Subtopic: Order, Molecularity and Mechanism |
81%
Level 1: 80%+
NEET - 2024
Hints
Which of the following plot represents the variation of \(ln ~k\) versus \(\frac 1{T}\) according to the Arrhenius equation?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Arrhenius Equation |
86%
Level 1: 80%+
NEET - 2024
Hints
Rate constants of a reaction at 500 K and 700 K are 0.04 \(s^{-1}\) and 0.14 \(s^{-1}\) respectively, then the activation energy of the reaction is:
[Given: log 3.5 = 0.5441, R = \(8.31 \text J\text K^{-1} \text{mol}^{-1}\) ]
1. 18231 J
2. 18500 J
3. 18219 J
4. 18030 J
[Given: log 3.5 = 0.5441, R = \(8.31 \text J\text K^{-1} \text{mol}^{-1}\) ]
1. 18231 J
2. 18500 J
3. 18219 J
4. 18030 J
Subtopic: Arrhenius Equation |
Level 3: 35%-60%
NEET - 2024
Hints
If the rate constant of a reaction is \(0.03 s^{-1}\), how much time does it take for \(7.2\text { mol L}^{-1}\) concentration of the reactant to get reduced to \(0.9~\text {mol L} ^{-1}?\)
(Given: log 2=0.301)
1. 210 s
2. 21.0 s
3. 69.3 s
4. 23.1 s
(Given: log 2=0.301)
1. 210 s
2. 21.0 s
3. 69.3 s
4. 23.1 s
Subtopic: First Order Reaction Kinetics |
65%
Level 2: 60%+
NEET - 2025
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