NEET (National Eligibility cum Medical Entrance Test) Chemistry: Questions 521 - 527 of 1145
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Question number: 521
» States of Matter » Solid State » Ionic
Question
A particular solid is very hard and has a high melting point. In solid state it is a non conductor of electricity. Classify the solid?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Amorphous |
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| b. | Metallic |
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| c. | Molecular |
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| d. | Ionic |
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Question number: 522
» States of Matter » Solid State » Bragg's Law and Its Applications
Question
X-rays of wavelength 1.54 A0 strike a crystal and are observed to be deflected at an angle of 22.5°. Assuming that n = 1, calculate the spacing between the planes of atoms that are responsible for this reflection?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 4.2 A° |
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| b. | 3.71 A° |
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| c. | 2.01 A° |
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| d. | 3.1 A° |
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Question number: 523
» States of Matter » Solid State » Unit Cell and Lattices
Question
In the simple cubic structure, what will be the contribution of atoms per unit cell?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 3 |
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| b. | 1 |
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| c. | 2 |
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| d. | 4 |
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Question number: 524
» States of Matter » Solid State » Ionic
Question
How many chloride ions are there around sodium ion in sodium chloride crystal?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 3 |
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| b. | 8 |
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| c. | 4 |
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| d. | 6 |
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Question number: 525
» States of Matter » Solid State » Voids
Question
Which of the following crystal has the Antifluorite structure?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Na2O |
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| b. | HgS |
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| c. | AgCl |
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| d. | AgI |
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Question number: 526
» Chemical Kinetics » Collision Theory of Bimolecular Gaseous Reactions
Question
According to Arrhenius theory, the rate is directly proportional to the number of effective collisions, here Z is?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Collision fraction |
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| b. | Collision frequency |
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| c. | Collision coefficient |
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| d. | None of the above |
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Question number: 527
» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions
Question
A substance reacts with initial concentration of a mol/dm3 according to zero order kinetics. The time it takes for the completion of the reaction is (k = rate constant)?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | k/a |
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| b. | a/2k |
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| c. | 2k/a |
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| d. | a/k |
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