NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 535 - 540 of 1258
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Question number: 535
» Chemical Kinetics » Arrhenius Theory
Question
In an Arrhenius equation for a certain reaction the value of A and Ea are 4×1013sec-1 and . At what temperature, the reaction will have specific rate constant 1.1×10-3 sec-1?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 340.3 K |
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| b. | 328.24 K |
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| c. | 377.56 K |
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| d. | 310.96 K |
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Question number: 536
» Chemical Kinetics » Rate of a Chemical Reaction
Question
The decomposition of nitrogen pent oxide follows first order rate law. Calculate the rate constant from the given data?
t = 800 sec [N2O5] = 1.45 mol/L
t = 1600 sec [N2O5] = 0.88 mol/L
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 0.467×10-4 sec-1 |
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| b. | 4.67×10-4 sec-1 |
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| c. | 0.64×104 sec-1 |
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| d. | 6.24×10-4 sec-1 |
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Question number: 537
» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions
Question
Which of the following equation is true regarding zero order reaction?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. | Either A or B |
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| c. |
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| d. |
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Question number: 538
» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions
Question
The half-life of first order reaction having rate constant k = 1.7×10-5 sec-1 is?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 11.3 hrs |
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| b. | 9.7 hrs |
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| c. | 12.1 hrs |
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| d. | 1.8 hrs |
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Question number: 539
» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions
Question
The first order reaction has half life of 14.5 hrs. What percentage of the reactant will remain after 24 hrs?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 18.3% |
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| b. | 68.2% |
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| c. | 45.5% |
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| d. | 31.8% |
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Question number: 540
» Chemical Kinetics » Rate Constant and Its Units
Question
Rate constant of a reaction is 175 litre-1mol-2sec-1. What is the order of the reaction?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 2 |
|
| b. | 3 |
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| c. | 1 |
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| d. | 0 |
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