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. |
Assertion (A): | In Haber's process, starting with 5 moles of N2 and 2.5 mol of H2, on complete reaction only 1.66 moles of NH3 were produced. |
Reason (R): | H2 acts as a limiting reagent in this reaction. |
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. |
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 |
Match the following physical quantities with units.
Physical quantity | Unit | ||
A. | Molarity | 1. | mol kg–1 |
B. | Molality | 2. | mol L–1 |
C. | Pressure | 3. | Candela |
D. | Luminous intensity | 4. | Pascal |
Codes:
A | B | C | D | |
1. | 1 | 4 | 2 | 3 |
2. | 2 | 1 | 4 | 3 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
Assertion (A): | The empirical mass of ethene is half of its molecular mass. |
Reason (R): | The empirical formula represents the simplest whole-number ratio of the various atoms present in a compound. |
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. |
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. |
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. |
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. |
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. |
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. |