Q.21)-Which of the following has the largest value of specific heat
  • Glass
  • Copper
  • Lead
  • Water
Q.22)-When hot water is sprinkled on a hotter glass tumbler it breaks because
  • Glass suddenly expands
  • Glass suddenly contracts
  • Water evaporates
  • Glass reacts chemically with water
Q.23)-Which one of the following is an insulator?
  • Copper
  • Wood
  • Mercury
  • Aluminium
Q.24)-Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
  • Conduction
  • Convection
  • Radiation
  • Both conduction and convection
Q.25)-Which of the following are methods of heat transfer
  • Convection
  • Evaporation
  • Revolution
  • Thermal expansion
Q.26)-Which of the following devices can be used to detect radiant heat
  • Liquid thermometer
  • Six's maximum and minimum thermometer
  • Constant volume air thermometer
  • Thermopile
Q.27)-Why white clothes keep you cooler as compared to black clothes?
  • They absorb whole of the light
  • They reflect the whole light
  • Penetration of light does not occur
  • Make the sunlight completely cool.
Q.28)-The dimensional formula of plank's constant contains the dimension of
  • Linear motion
  • Angular momentum
  • Energy
  • Force
Q.29)-When hot liquid is poured into a thick glass tumbler it cracks because glass
  • Is a bad conductor of heat so only inner surface expands
  • Has high temperature coefficient of expansion
  • Has very low specific heat
  • Has very low temperature coefficient of expansion
Q.30)-First law of thermodynamics is normally related to
  • Law of conservation of energy
  • Newton's law of cooling
  • Boyle's law
  • Charle's law