The amount of Zinc (atomic weight=65) necessary to produce 224 mL of H2 (at STP) by the reaction with dilute sulphuric acid will be:
1. | 0.65 g | 2. | 7.6 g |
3. | 6.5 g | 4. | 8.5 g |
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On complete decomposition, the volume of CO2 released at STP on heating 9.85 g of BaCO3 (atomic mass, Ba = 137) will be:
1. 1.12 L
2. 4.84 L
3. 2.12 L
4. 2.06 L
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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. |
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When 22.4 L of H2 (g) is mixed with 11.2 L of Cl2 (g), each at STP, the moles of HCl(g) formed is equal to -
1. | 1 mole of HCl (g) | 2. | 2 moles of HCl (g) |
3. | 0.5 mole of HCl (g) | 4. | 1.5 mole of HCl (g) |
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ln, a closed vessel, 50 ml of completely reacts with 200 ml of C2 according to the following equation:
The composition of the gaseous mixture in the system will be:
1. 100 ml
2. 25 ml
3. 75 ml
4. 10 ml
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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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If 0.5 moles of BaCl2 is reacted with 0.2 moles of Na3PO4 then the maximum moles of Ba3(PO4)2 formed is:
1. | 0.33 | 2. | 0.25 |
3. | 0.10 | 4. | 0.52 |
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In a reaction A + B2 →AB2,
A will act as a limiting reagent if :
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 |
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20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g of magnesium oxide.
The percentage purity of magnesium carbonate in the sample will be:
(Atomic weight of Mg=24)
1. | 75 | 2. | 96 |
3. | 60 | 4. | 84 |
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The moles of lead (II) chloride that will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl are:
1. 0.044
2. 0.333
3. 0.011
4. 0.029
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