Class IX

The interparticle forces of attraction are weakest in
  1. water
  2. alcohol
  3. sodium chloride
  4. hydrogen gas
Which of the following has highest melting point?
  1. Ni
  2. Fe
  3. Pt
  4. W
. The colour of vapours formed on sublimation of iodine solid is
  1. Purple (violet)
  2. Colourless
  3. Yellow
  4. orange
Which of the following has minimum spaces among the particles?
  1. Gases
  2. Solid
  3. Liquid
  4. None of these
Bose-Einstein Condensate have
  1. Very low kinetic energy
  2. Low kinetic energy
  3. High kinetic energy
  4. Highest kinetic energy.
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