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Q. No.
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Match the following physical quantities with units.
| Physical quantity | Unit | ||
| A. | Molarity | (i). | mol kg–1 |
| B. | Molality | (ii). | mol L–1 |
| C. | Pressure | (iii). | Candella |
| D. | Luminous intensity | (iv). | Pascal |
Codes:
| A | B | C | D | |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (ii) | (i) | (iv) | (iii) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (iv) | (i) | (iii) | (ii) |
Subtopic: Introduction |
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Level 1: 80%+
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| Assertion (A): | The significant figure for 0.200 is 3, whereas the significant figure for 200 is 1. |
| Reason (R): | Zero at the end or right of a number is significant, provided it is not on the right side of the decimal point. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Introduction |
59%
Level 3: 35%-60%
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One of the statements of Dalton's atomic theory is given below:
"Compounds are formed when atoms of different elements combine in a fixed ratio"
Which of the following laws is not related to this statement?
(a) Law of conservation of mass
(b) Law of definite proportions
(c) Law of multiple proportions
(d) Avogadro law
Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
Subtopic: Introduction |
Level 3: 35%-60%
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Assertion: Specific gravity is dimensionless.
Reason: Specific gravity is the density of a substance measured with respect to density of water at 4°C.
1. Both statements are true and the reason is the correct explanation of the assertion.
2. Both statements are true but the reason is not the correct explanation of the assertion.
3. Assertion is true and the reason is false.
4. Assertion is false and reason is true.
Reason: Specific gravity is the density of a substance measured with respect to density of water at 4°C.
1. Both statements are true and the reason is the correct explanation of the assertion.
2. Both statements are true but the reason is not the correct explanation of the assertion.
3. Assertion is true and the reason is false.
4. Assertion is false and reason is true.
Subtopic: Introduction |
71%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | Atoms can neither be created nor destroyed. |
| Reason (R): | Under similar conditions of temperature and pressure, an equal volume of gases do not contain an equal number of molecules. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Introduction |
72%
Level 2: 60%+
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| Assertion (A): |
The mass of 233 g of BaSO₄ corresponds to one mole of BaSO₄. |
| Reason (R): | One mole of BaSO4 is obtained when one mole of BaCl2 is treated with 1 litre of 1M H2SO4. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Introduction |
66%
Level 2: 60%+
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