Class X

Among four, highest wavelength is of
  1. Radio waves
  2. Infrared
  3. Ultraviolet
  4. Gamma rays
Two types of moment of force are
  1. Clockwise and Anti-clockwise
  2. Stable and Unstable
  3. Neutral and charged
  4. Forward and backward
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
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
Electromagnetic waves carry
  1. Positive charge
  2. Negative charge
  3. No charge
  4. Both positive and negative charge
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