The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are__________________?

Related Mcqs:

1. At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?

   A. 273°C
   B. 273°K
   C. 100°C
   D. 200°C

2. Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is_________________?

   A. 1.72
   B. 0.58
   C. 0.5
   D. 0.2

3. 40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is_________________?

   A. 1/2
   B. 1/3
   C. 1/4
   D. 2/3

4. What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C ?

   A. 2/3
   B. 1/3
   C. 1/2
   D. 1/3 × (298/273)

5. Weight of 56 litres of ammonia at N.T.P. is _____________ gm?

   A. 2.5
   B. 42.5
   C. 56
   D. 2800

6. 2 litres of nitrogen at N.T.P. weighs ______________ gms ?

   A. 14
   B. 2.5
   C. 28
   D. 1.25

7. The pressure of ‘V’ litres of a dry gas is increased from 1 to 2 kgf/cm2 at a constant temperature. The new volume will become___________________?

   A. V/2
   B. 2V
   C. V/4
   D. V2

8. 1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ?

   A. 5
   B. 10
   C. 15
   D. 20

9. Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be _______________ atmosphere?

   A. 0.5
   B. 1
   C. 1.5
   D. 2

10. The total number of atoms in 8.5 gm of NH3 is _______________ × 1023?

    A. 9.03
    B. 3.01
    C. 1.204
    D. 6.02