Chapter-5: States of Matter

1. A gas will approach ideal behaviour at

  • Low temperature, low pressure
  • Low temperature, high pressure
  • High temperature, low pressure
  • High temperature, high pressure
Answer
High temperature, low pressure

2. Sl unit of pressure is :

  • Pascal
  • torr
  • mm of Hg
  • none of the above
Answer
Pascal

3. If the pressure of a gas is increased then its mean free path becomes:

  • 0
  • Less
  • More
  • Infinity
Answer
Less

4. 1 atmosphere is equal to:

  • 1 torr
  • 760 cm
  • 760 mm
  • 76 torr
Answer
760 mm

5. The rise or fall of a liquid within a tube of small bore is called :

  • Surface Tension
  • Capillary Action
  • Viscosity
  • Formation of Curvature
Answer
Capillary Action

6. Cooling is caused by :

  • Evaporation
  • Convection
  • Conduction
  • none of the above
Answer
Conduction

7. The volume of 2.8 g of carbon monoxide at 27°C and 0.0821 atm is

  • 30 L
  • 3 L
  • 0.3 L
  • 1.5 L
Answer
30 L

8. Grahams law refers to :

  • Boiling point of water
  • Gaseous Diffusion
  • Gas Compression
  • Volume changes of gases
Answer
Gaseous Diffusion

9. Containers A and B have same gas. Pressure, volume and temperature of A are all twice those of B. The ratio of number of molecules of A and B is

  • 1:2
  • 2:1
  • 1:4
  • 4:1
Answer
2:1

10. The internal resistance to the flow of a liquid is called :

  • Surface Tension
  • Diffusion
  • Viscosity
  • Osmosis
Answer
Viscosity

11. When did substances exist in different crystalline forms the phenomenon is called :

  • Allotropy
  • Polymorphism
  • Polymerization
  • Isomorphism
Answer
Polymorphism

12. According to kinetic theory of gases,in an ideal gas,between two successive collisions a gas molecule travels

  • In a circular path
  • In a wavy path
  • In a straight line path
  • With an accelerated velocity
Answer
In a straight line path

13. Equal masses of ethane and hydrogen are mixed in an empty container at 25°C . The fraction of total pressure exerted by hydrogen is

  • 1:2
  • 1:1
  • 01:16
  • 15:16
Answer
15:16

14. The rates of diffusion of gases are inversely proportional to square root of their densities . This statement refers to :

  • Daltons Law
  • Grahams Law
  • Avogadros Law
  • None of the Above
Answer
Grahams Law

15. According to kinetic theory of gases,in an ideal gas,between two successive collisions a gas molecule travels

  • In a circular path
  • In a wavy path
  • In a straight line path
  • With an accelerated velocity
Answer
In a straight line path