Class X

 If we decrease humidity in air, rate of evaporation would
  1. Increase
  2. Adecrease
  3. Remain same
  4. May increase or decrease
 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
 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
Mass is related to weight by
  1. W = mv, where m is mass and v is velocity
  2. W = mg, where m is mass and g is gravitational pull
  3. W = vg, where v is velocity and g is gravitational pull
  4. W = da, where d is distance and a is acceleration
Change in state of matter from gas to liquid is termed as
  1. Boiling
  2. Solidification
  3. Condensation
  4. Sublimation
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