Class X

 A person boils water from 75 °C, water uses thermal energy of 10000 J, heat capacity of water is
  1. 200 J K-1
  2. −200 J K-1
  3. 400 J K-1
  4. −400 J K-1
Two types of lenses are
  1. Small and large
  2. Converging and diverging
  3. Transpiring and respiring
  4. Living and non-living
Food we eat contains
  1. Chemical Potential Energy
  2. Elastic Potential Energy
  3. Gravitational Potential Energy
  4. Kinetic energy
A thermometer has l100 50 cm and l0 is 10 cm, if lθ is 15 cm temperature of thermometer would be
  1. 25 °C
  2. 17.5 °C
  3. 12.5 °C
  4. 50 °C
Lf is symbol for
  1. Latent heat of Fusion
  2. Specific Latent Heat of Vaporization
  3. Specific Latent Heat of Fusion
  4. Latent Heat of Vaporization
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