Class X

As pressure is lowered,
  1. Melting point of ice decreases
  2. Melting point of ice increases
  3. Boiling point of water increases
  4. No change is observed melting point of ice or boiling point of water
Two types of moment of force are
  1. Clockwise and Anti-clockwise
  2. Stable and Unstable
  3. Neutral and charged
  4. Forward and backward
Boiling occurs at
  1. Fixed Temperature
  2. Unfixed Temperature
  3. Any Temperature
  4. Liquid bottom
Melting occurs at a constant temperature for
  1. Impure substances only
  2. Pure substances only
  3. Impure and pure substances both
  4. None
Latent heat of vaporization is
  1. Amount of heat required to raise temperature of a 1 kg of a substance by 1 K
  2. Amount of heat required to raise temperature of a substance by 1 K
  3. Amount of heat required to change phase of a substance from solid to liquid without any change in temperature
  4. Amount of heat required to change phase of a substance from liquid to gas without any change in temperature
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