General
✓✗The maximum number of molecules is present in
- 15 L of H2 gas at STP
- 5 L of N2 gas at STP
- 0.5 g of H2 gas
- 10 g of O2 gas
General
✓✗The number of atoms in 4.25 g of NH3 is approximately
- 4 ´ 1023
- 2 ´ 1023
- 1 ´ 1023
- 6 ´ 1023
General
✓✗10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be
- 3 mol
- 4 mol
- 1 mol
- 2 mol
General
✓✗What volume of oxygen gas (O2) measured at 0°C and 1 atm, is needed to burn completely 1 L of propane gas (C3H8) measured under the same conditions?
- 5 L
- 10 L
- 7 L
- 6 L
General
✓✗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 :
4NH3(g) + 5O2(g) ® 4NO(g) + 6H2O(l)
when 1 mole of ammonia and 1 mole of O2 are made to react to completion :
- all the oxygen will be consumed
- 1.0 mole of NO will be produced
- 1.0 mole of H2O is produced
- all the ammonia will be consumed
General
✓✗Volume of CO2 obtained by the complete decomposition of 9.85 g of BaCO3 is
- 2.24 L
- 1.12 L
- 0.84 L
- 0.56 L
General
✓✗Ratio of Cp and CV of a gas 'X' is 1.4. The number of atoms of the gas 'X' present in 11.2 litres of it at NTP will be
- 6.02 ´ 1023
- 1.2 ´ 1023
- 3.01 ´ 1023
- 2.01 ´ 1023
General
✓✗In which case is number of molecules of water maximum?
- 18 mL of water
- 0.18 g of water
- 0.00224 L of water vapours at 1 atm and 273 K
- 10–3 mol of water
General
✓✗When 22.4 litres of H2(g) is mixed with 11.2 litres of Cl2(g), each at S.T.P, the moles of HCl(g) formed is equal to
- 1 mol of HCl(g)
- 2 mol of HCl(g)
- 0.5 mol of HCl(g)
- 1.5 mol of HCl(g)
General
✓✗1 cc N2O at NTP contains
-
atoms
-
molecules
-
electrons
- all of the above
General
✓✗The number of atoms in 0.1 mol of a triatomic gas is (NA = 6.02 ´ 1023 mol–1)
- 6.026 ´ 1022
- 1.806 ´ 1023
- 3.600 ´ 1023
- 1.800 ´ 1022
General
✓✗The dimensions of pressure are the same as that of
- force per unit volume
- energy per unit volume
- force
- energy
General
✓✗The number of moles of oxygen in one litre of air containing 21% oxygen by volume, under standard conditions, is
- 0.0093 mol
- 2.10 mol
- 0.186 mol
- 0.21 mol
General
✓✗Which has maximum molecules?
- 7 g N2
- 2 g H2
- 16 g NO2
- 16 g O2
General
✓✗A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with cone. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be
- 1.4
- 3.0
- 2.8
- 4.4