Q. No.The mass of ammonia produced when 2.00 × 103 g dinitrogen reacts with 1.00 ×103 g of dihydrogen is:
1.
2338.11 g
2.
2428.57 g
3.
2712.24 g
4.
2180.56 g
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Two students performed the same experiment separately, and each of them recorded two readings of mass, which are given below. The correct reading of mass is 3.0 g. On the basis of the given data, mark the correct option out of the following statements.
| Students | Readings | |
| (i) | (ii) | |
| A | 3.01 | 2.99 |
| B | 3.05 | 2.95 |
| 1. | The results of both the students' are neither accurate nor precise. |
| 2. | The results of student A are both precise and accurate. |
| 3. | Student B's results are neither precise nor accurate. |
| 4. | The results of student B are both precise and accurate. |
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A reading on Fahrenheit scale is . The same reading on celsius scale will be :
1. 40°C
2. 94°C
3. 93°C
4. 30°C
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1. 1.5 M
2. 1.66 M
3. 0.017 M
4. 1.59 M
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1. 4 g He
2. 46 g Na
3. 0.40 g Ca
4. 12 g He
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1. molecules
2. molecules
3. molecules
4. molecules
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The empirical formula and molecular mass of a compound are and 180 g, respectively. The molecular formula of the compound is:
1. C9H18O9
2. CH2O
3. C6H12O6
4. C2H4O2
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If the density of the solution is 3.12 g ml-1, then what will be the mass of the 1.5 ml solution in two significant figures?
| 1. | \(4.4~\mathrm{g}\) | 2. | \(4680 \times 10^{3} ~\mathrm{g}\) |
| 3. | \(4.7~\mathrm{g}\) | 4. | \(46.80~\mathrm{g}\) |
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The incorrect statement among the following is:
| 1. |
A molecule of a compound contains atoms from various elements. |
| 2. |
A compound cannot be broken down into its constituent elements using physical separation techniques. |
| 3. | A compound retains the physical properties of its constituent elements. |
| 4. | The ratio of atoms of different elements in a compound is fixed. |
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Identify the reaction that does not obey the law of conservation of mass from the provided options:
1.
2.
3.
4.
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