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Q. No.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 |
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From NCERT
NEET - 2024
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Which plot of In k vs \(\frac{\text{I}}{\text{T}}\) is consistent with Arrhenius equation?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Arrhenius Equation |
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NEET - 2024
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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
1. 380.4 kJ/mol
2. 3.80 kJ/mol
3. 3804 kJ/mol
4. 38.04 kJ/mol
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 |
From NCERT
NEET - 2024
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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. | \(\dfrac{-\Delta[\mathrm{H}]]}{\Delta t}=\dfrac{2 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\) | 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. | \( \dfrac{-\Delta[\mathrm{H}]}{\Delta t}=\dfrac{\Delta\left[\mathrm{H}_2\right]}{\Delta t}\) |
Subtopic: Definition, Rate Constant, Rate Law |
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From NCERT
NEET - 2024
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Effective collisions are known to possess:
A: energy greater than threshold energy.
B: breaking of old bond in reactant.
C: formation of new bond in 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
A: energy greater than threshold energy.
B: breaking of old bond in reactant.
C: formation of new bond in 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 |
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The time taken by the first order decomposition of \(\text{SO}_2\text{Cl}_2\) to decompose to 40% is 560 seconds. The rate constant for the reaction is:
(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. \(2.126 \times 10^{-5} \mathrm{~min}^{-1}\)
(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. \(2.126 \times 10^{-5} \mathrm{~min}^{-1}\)
Subtopic: First Order Reaction Kinetics |
From NCERT
NEET - 2024
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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:
1. 1, 0
2. 0, 1
3. 1, 2
4. 2, 1
| 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 |
From NCERT
NEET - 2024
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Which of the following plot represents the variation of \(ln ~k\) versus \(\frac 1{T}\) in according with Arrhenius equation?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Arrhenius Equation |
From NCERT
NEET - 2024
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Rate constants of a reaction at 500 K and 700 K are 0.04 \(s^{-1}\) and 0.14 \(s^{-1}\), respectively; then, activation energy of the reaction is:
(Given : log 3.5 = 0.5441, R = 8.31 J \(K^{-1} \) \(\mathrm {mol}^{-1}\))
1. 182310 J
2. 18500 J
3. 18219 J
4. 18030 J
(Given : log 3.5 = 0.5441, R = 8.31 J \(K^{-1} \) \(\mathrm {mol}^{-1}\))
1. 182310 J
2. 18500 J
3. 18219 J
4. 18030 J
Subtopic: Arrhenius Equation |
From NCERT
NEET - 2024
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For a reaction \(3A \rightarrow 2B\)
The average rate of appearance of B is given by \(\Delta [B] \over \Delta t\).
The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:
The average rate of appearance of B is given by \(\Delta [B] \over \Delta t\).
The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:
| 1. | \(-\Delta [A] \over \Delta t\) | 2. | \(-3\Delta [A] \over 2\Delta t\) |
| 3. | \(-2\Delta [A] \over 3\Delta t\) | 4. | \(\Delta [A] \over \Delta t\) |
Subtopic: Definition, Rate Constant, Rate Law |
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From NCERT
NEET - 2023
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