#4 | Stoichiometry
(Chemistry) > Some Basic Concepts Of Chemistry
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What volume of  oxygen gas (O2) measured at 0°C and 1 atm, is needed to burn completely 1L of  propane gas (C3H8) measured under the same conditions?

(1) 7L 

(2) 6L

(3) 5L

(4) 10L

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1 g of magnesium is burnt with 0.56g of oxygen in a closed vessel. Which reactant is left in excess and how much?

(At. weight of Mg = 24, O=16)

(1) Mg, 0.16g

(2) O2, 0.16g

(3) Mg, 0.44g

(4) O2, 0.28g

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Assuming fully decomposed, the volume of CO2 released at STP on heating 9.85g of BaCO3 [at. mass of Ba = 137] will be

(1) 1.12L

(2) 0.84L

(3) 2.24L

(4) 4.96L

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The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (at. mass of Al = 27)

1. 180 kg

2. 270 kg

3. 540 kg

4. 90 kg

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In the reaction, 4NH3(g)+ 5O2(g) 4NO(g) +6H2O(l)

When 1 mole of ammonia and 1 mole of O2 are made to react 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

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