Class X

 Continuous motion of these tiny particles (atoms) is termed as
  1. Potential model of atoms
  2. Kinetic model of matter
  3. Potential model of matter
  4. kinetic model of atoms
 An unmarked alcohol-in-glass thermometer has l100 60 cm and l0 is 10 cm, if lθ is 50 cm, temperature of thermometer would be
  1. 20 °C
  2. 40 °C
  3. 60 °C
  4. 80 °C
Atmospheric pressure is calculated by the
  1. Height of water column in barometer
  2. Height of mercury column in barometer
  3. Height of lime column in barometer
  4. Height of oil column in barometer
 If heat capacity of a solid is 1500 JK-1 and mass is 75 kg. specific heat capacity of solid would be
  1. 10 J kg-1 °C-1
  2. 20 J kg-1 °C-1
  3. 30 J kg-1 °C-1
  4. 40 J kg-1 °C-1
 If we decrease humidity in air, rate of evaporation would
  1. Increase
  2. Adecrease
  3. Remain same
  4. May increase or decrease
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