- 1(current)
Q. No.| Statement I: | The number of molecules in 1g NH3 is more than 1g N2 . |
| Statement II: | 1mole of NH3 as well as 1 mole of N2 contains \(6.023 \times10^{23}\) atoms. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
Subtopic: Moles, Atoms & Electrons |
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Given below are two statements:
In the light of the above statements, choose the correct answer from the option given below:
1. Both Statement I and Statement II is true.
2. Both Statement I and Statement II is false.
3. Statement I is true but Statement II is false.
4. Statement I is false but Statement II is true.
| Statement I: | Both 106 g of sodium carbonate and 12 g of graphite have the same number of carbon atoms. |
| Statement II: | Both 106 g of sodium carbonate and 12 g of graphite contain 1 g atom (1 mole) of carbon atoms. |
In the light of the above statements, choose the correct answer from the option given below:
1. Both Statement I and Statement II is true.
2. Both Statement I and Statement II is false.
3. Statement I is true but Statement II is false.
4. Statement I is false but Statement II is true.
Subtopic: Moles, Atoms & Electrons |
74%
From NCERT
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Given below are two statements:
| Assertion (A): | Equivalent volume of H2 is 11.2 L at 1 atm and 273 K. |
| Reason (R): | 1/2 mole H2 has produced when 1 mole of H+ (aq.) accepted 1 mole of e-. |
| 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: Moles, Atoms & Electrons |
60%
From NCERT
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| Assertion (A): | The number of molecules in 2 moles of NH3 is equal to the number of molecules in 4 moles of CH4. |
| Reason (R): | Both are chemically similar species. |
| 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: Moles, Atoms & Electrons |
81%
From NCERT
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| Assertion (A): | 1 a.m.u = 1 .66 × 10−24 gram . |
| Reason (R): | The actual mass of one atom of C-12 is equal to 1.99 × 10-23 g . |
| 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: Moles, Atoms & Electrons |
From NCERT
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| Assertion (A): | The combustion of 16 g of methane gives 18 g of water. |
| Reason (R): | In the combustion of methane, water is one of the products. |
| 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: Moles, Atoms & Electrons |
66%
From NCERT
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Given below are two statements:
| Assertion (A): | One atomic mass unit is defined as one-twelfth of the mass of one carbon-12 atom. |
| Reason (R): | The carbon-12 isotope is the most abundant isotope of carbon and has been chosen as the standard. |
| 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: Moles, Atoms & Electrons |
From NCERT
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| Assertion (A): | 1 g O2 and 1 g O3 have an equal number of oxygen atoms. |
| Reason (R): | O2 and O3 have different molar masses. |
| 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: Moles, Atoms & Electrons |
From NCERT
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Match the following:
| COLUMN I | COLUMN II | ||
| A. | 88 g of CO2 | 1. | 0.25 mol |
| B. | 6.022×1023 molecules of H2O | 2. | 2 mol |
| C. | 5.6 L of O2 at STP | 3. | 3 mol |
| D. | 96 g of O2 | 4. | 1 mol |
| A | B | C | D | |
| 1. | 2 | 4 | 1 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Moles, Atoms & Electrons |
92%
From NCERT
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- 1(current)
Q. No.
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