Class X

Considering kinetic theory of particles, solids have
  1. Fixed shape and volume
  2. Variable shape and volume
  3. Variable shape but fixed volume
  4. Fixed shape but variable volume
"Distance of virtual image and object is equal from mirror". This statement is
  1. Right
  2. Wrong
  3. May be right or may be wrong
  4. Neither right nor wrong
 Sound is slowest in
  1. Air
  2. Liquid
  3. Solid
  4. Vacuum
 Volume of pure water is 62 m³ and mass is 62000 kg, its density is
  1. 100 kg m-3
  2. 10 kg m-3
  3. 1000 kg m-3
  4. 1 × 10-3
Electromagnetic wave with lowest frequency is
  1. Radio waves
  2. Infrared
  3. Ultraviolet
  4. Gamma rays
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