9th Class Physics Chapter 7 Test7. Density And Temperature

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. When a gas is heated, it may change:
   1. Volume
   2. Pressure
   3. Both a & b
   4. Color
2. Molecules in motion. When temperature is:
   1. Low
   2. High
   3. Constant
   4. None of these
3. Ionic state of matter is called:
   1. Gas
   2. Plasma
   3. Liquid
   4. None of these
4. Which material is used in thermometer?
   1. Mercury
   2. Water
   3. Milk
   4. All of these
5. Weakest attractive forces are in:
   1. Solid
   2. Liquid
   3. Gases
   4. Plasma
6. In internal energy, potential energy of the particle of the substance is:
   1. Attractive force
   2. Repulsive force
   3. Constant force
   4. Net force
7. The degree of hotness are coldness:
   1. Heat
   2. Temperature
   3. Internal energy
   4. Kinetic energy
8. Plasma is:
   1. Good conductor
   2. Bad conductor
   3. semi-conductor
   4. Non conductor
9. The molecules of the matter are always remains in state of:
   1. Rest
   2. Plasma
   3. Motion
   4. Tension
10. Mass per unit volume is called:
    1. speed
    2. velocity
    3. density
    4. pressure