Q. No.What mass of zinc (atomic mass = 65 g mol⁻¹) is required to produce 224 mL of H₂ gas at STP when zinc reacts with dilute sulphuric acid?
| 1. | 0.65 g | 2. | 7.6 g |
| 3. | 6.5 g | 4. | 8.5 g |
What volume of CO₂ gas will be produced at STP when 9.85 g of BaCO₃ is completely decomposed on heating?
Given: Atomic mass of Ba = 137
1. 1.12 L
2. 4.84 L
3. 2.12 L
4. 2.06 L
| 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. |
What number of moles of HCl gas will be formed when 22.4 L of H₂ is mixed with 11.2 L of Cl₂ at STP?
| 1. | 1 moles of HCl (g) | 2. | 2 moles of HCl (g) |
| 3. | 0.5 moles of HCl (g) | 4. | 1.5 moles of HCl (g) |
ln a closed vessel, 50 ml of completely reacts with 200 ml of C2 according to the following equation:
What will be the composition of the gaseous mixture in the system?
1. 100 ml
2. 25 ml
3. 75 ml
4. 10 ml
What mass of ammonia will be produced when 2.00 × 10³ g of N₂ reacts with 1.00 × 10³ g of H₂?
| 1. | 2338.11 g
|
2. | 2428.57 g
|
| 3. | 2712.24 g
|
4. | 2180.56 g |
If 0.5 mole of BaCl2 reacts with 0.2 mole of Na3PO4, what is the maximum number of moles of Ba₃(PO₄)₂ that can be formed?
| 1. | 0.33 | 2. | 0.25 |
| 3. | 0.10 | 4. | 0.52 |
For the reaction:
A + B₂ → AB₂
Which of the following cases represent situations in which A acts as the limiting reagent?
| i. | 300 atoms of A reacts with 200 molecules of B |
| ii. | 2 moles A reacts with 3 moles B2 |
| iii. | 100 atoms of A reacts with 100 molecules of B |
| iv. | 5 moles A reacts with 2.5 moles B |
| v. | 2.5 moles A reacts with 5 moles B2 |
Choose the correct option:
| 1. | (i), (ii) | 2. | (i), (ii), (v) |
| 3. | (ii), (v) | 4. | All |
A 20.0 g impure sample of magnesium carbonate is heated completely and produces 8.0 g of magnesium oxide along with carbon dioxide.
Given: Atomic mass of Mg = 24
What is the percentage purity of MgCO3 in the sample?
| 1. | 75 | 2. | 96 |
| 3. | 60 | 4. | 84 |
What is the number of moles of PbCl₂ formed when 6.5 g of PbO reacts with 3.2 g of HCl?
1. 0.044
2. 0.333
3. 0.011
4. 0.029
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