Class VII

An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will
  1. flow from iron ball to water
  2. not flow from iron ball to water or from water to iron ball.
  3. flow from water to iron ball
  4. increase the temperature of both.
Unit of heat energy is
  1. kilogram
  2. metre
  3. joule
  4. degree
One litre of water at 30°C is mixed with one litre of water at 50°C. Thetemperature of the mixture will be
  1. 80°C
  2. more than 50°C but less than 80°C
  3. 20°C
  4. between 30°C and 50°C
Higher the temperature of the body _____ is the kinetic energy of the molecules of that body?
  1. higher
  2. lower
  3. same
  4. none of these
Boiling point of water is
  1. 0° C
  2. 100° C
  3. 357° C
  4. -39°C
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