What volume of oxygen gas (O2) measured at 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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
12 g of Mg (atomic mass=24) will react completely with an acid to give:
1. one mole of H2
2. half mole of H2
3. one mole of O2
4. none of these
Difficulty Level: