Class VII

Definite shape and volume, high density and not easily flowing are physical properties of a
  1. Solid
  2. Liquid
  3. Gas
  4. All of them
Movement of particles from an area of higher concentration to an area of lower concentration is called
  1. Osmosis
  2. Diffusion
  3. Brownian motion
  4. Clockwise movement
Widely spaced particles are found in
  1. Solid
  2. Liquid
  3. Gas
  4. All of them
78% is total percentage of gas in clean air which is
  1. Oxygen
  2. Nitrogen dioxide
  3. Nitrogen
  4. Carbon dioxide
All matter is made up of tiny discrete particles too small to be seen was hypothesis of
  1. Democritus
  2. Aristotle
  3. Robert brown
  4. Albert Einstein
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