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Q. No.Match List-I with List-II:
Choose the correct answer from the options given below:
| List-I (Order of reaction) | List-II (Unit of rate constant) | ||
| A. | Zero order | I. | \(\mathrm{mol}^{-1} \mathrm{~L} \mathrm{~s}^{-1}\) |
| B. | First order | II. | \(\mathrm{mol}^{-2} \mathrm{~L}^2 \mathrm{~s}^{-1}\) |
| C. | Second order | III. | \(\mathrm {s}^{-1}\) |
| D. | Third order | IV. | \(\mathrm{mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\) |
Choose the correct answer from the options given below:
| 1. | A-IV, B-III, C-II, D-I |
| 2. | A-I, B-II, C-III, D-IV |
| 3. | A-IV, B-III, C-I, D-II |
| 4. | A-IV, B-II, C-I, D-III |
Subtopic: Definition, Rate Constant, Rate Law | First Order Reaction Kinetics |
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Level 2: 60%+
NEET - 2026
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For a certain reaction R → Product, the plot of concentration [R] vs time has a negative slope as shown. The order of reaction is :
1. 0
2. 1
3. 2
4. 2.5
1. 0
2. 1
3. 2
4. 2.5
Subtopic: Definition, Rate Constant, Rate Law | Order, Molecularity and Mechanism |
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Level 2: 60%+
NEET - 2026
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Given below is an expression for the rate constant of a first order reaction occurring at a certain temperature, T(K).
\(\ln k = 14\cdot34 - \frac{1\cdot25 \times 10^4}{T}\)
The energy of activation in kcal mol-1 for the reaction is :
(Given : k in \(s^{-1}, R = 1.987 ~\text{cal mol}^{-1} K^{-1})\)
1. 12.42
2. 14.34
3. 18.63
4. 24.84
\(\ln k = 14\cdot34 - \frac{1\cdot25 \times 10^4}{T}\)
The energy of activation in kcal mol-1 for the reaction is :
(Given : k in \(s^{-1}, R = 1.987 ~\text{cal mol}^{-1} K^{-1})\)
1. 12.42
2. 14.34
3. 18.63
4. 24.84
Subtopic: First Order Reaction Kinetics | Arrhenius Equation |
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Level 2: 60%+
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For an elementary chemical reaction, the Arrhenius plot is given below.
If the energy of activation is 6.64 kJ mol–1 and R = 8.3 J K–1 mol–1, the temperature at which the rate constant becomes e2 min–1, is:
If the energy of activation is 6.64 kJ mol–1 and R = 8.3 J K–1 mol–1, the temperature at which the rate constant becomes e2 min–1, is:
| 1. | 250 K | 2. | 125 K |
| 3. | 150 K | 4. | 200 K |
Subtopic: Arrhenius Equation |
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Level 3: 35%-60%
NEET - 2026
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\(2A \xrightarrow{k} B\) is a zero-order reaction, where \(k = 1.0 \text{ mol L}^{-1} \text{min}^{-1}\). If the initial concentration of A is \(2 \text{ M}\), then the time taken to complete (75%) of the reaction will be :
| 1. | 2.0 min | 2. | 1.5 min |
| 3. | 0.75 min | 4. | 1.0 min |
Subtopic: Definition, Rate Constant, Rate Law |
Level 4: Below 35%
NEET - 2026
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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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\(C(s) + 2 H_2(g) \rightarrow CH_4(g); \Delta H = -74.8~kJ mol^{-1}\)
Which of the following diagrams gives an accurate representation of the above reaction?
[R→reactants; P→products]
Which of the following diagrams gives an accurate representation of the above reaction?
[R→reactants; P→products]
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Arrhenius Equation |
60%
Level 2: 60%+
NEET - 2025
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If the half-life \((t_{1/2})\) for a first order reaction is \(1~\text{minute}\), then the time required for \(99.9 \%\) completion of the reaction is closest to :
1. \(5~\text{minutes}\)
2. \(10~\text{minutes}\)
3. \(2~\text{minutes}\)
4. \(4~\text{minutes}\)
1. \(5~\text{minutes}\)
2. \(10~\text{minutes}\)
3. \(2~\text{minutes}\)
4. \(4~\text{minutes}\)
Subtopic: First Order Reaction Kinetics |
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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
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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 |
68%
Level 2: 60%+
NEET - 2024
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