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Q. No.1 g of magnesium is burnt with 0.56g of oxygen in a closed vessel. The left-out reactant and its quantity are
(At. weight of Mg = 24, O=16)
| 1. | Mg, 0.16g | 2. | O2, 0.16g |
| 3. | Mg, 0.44g | 4. | O2, 0.28g |
If 10 volumes of H2 gas react with 5 volumes of O2 gas, the volumes of water vapor produced would be:
1. 9
2. 8
3. 10
4. 11
To produce 20 moles of ammonia via Haber's process, how many moles of hydrogen molecules are required?
| 1. | 40 mol | 2. | 10 mol |
| 3. | 20 mol | 4. | 30 mol |
The volume of oxygen gas (O2) needed to completely burn 1 L of propane gas (C3H8) (both O2 & propane measured at 0°C and 1 atm) will be:
1. 7 L
2. 6 L
3. 5 L
4. 10 L
10 g of a silver coin, when dissolved completely in excess of conc. HNO3 gives 8.5 g of silver nitrate.
The percentage purity of the coin is-
| 1. | 25% | 2. | 54% |
| 3. | 67% | 4. | 100% |
In the reaction, 4NH3(g)+ 5O2(g) 4NO(g) +6H2O(l)
When 1 mole of ammonia and 1 mole of O2 reacts to completion, then:
| 1. | 1.0 mole of H2O is produced. |
| 2. | 1.0 mole of NO will be produced. |
| 3. | All the oxygen will be consumed. |
| 4. | All the ammonia will be consumed. |
Consider the given reaction, 2SO2 + O2 2SO3
6.4 g SO2 and 3.2 g O2 to form SO3 . The mass of SO3 formed is:
1. 32 g
2. 16 g
3. 8 g
4. 4 g
Amount of HCl that would react with 5.0 g of manganese dioxide, as per the
given reaction will be:
4HCl(aq) + MnO2(s) ➡ 2H2O(l) + MnCl2(aq) + Cl2(2)
1. 4.8 g
2. 6.4 g
3. 2.8 g
4. 8.4 g
When 100 mL of PH3 is decomposed, it produces phosphorus and hydrogen. The change in volume is:
| 1. | 50 mL increase. | 2. | 500 mL decrease. |
| 3. | 900 mL decrease. | 4. | None of the above. |
| Assertion (A): | When 4 moles of H2 reacts with 2 moles of O2, then 4 moles of water are formed. |
| Reason (R): | O2 will act as a limiting reagent. |
| 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. |
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Q. No.
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