CBSE  /  Class 12  /  Chemistry  /  Solutions

  • 1. 
    Sprinkling of salt helps in clearing the snow covered roads in hills. The phenomenon involved in the process is

  • lowering in vapour pressure of snow
  • depression in freezing point of snow
  • melting of ice due to increase in temperature by putting salt
  • increase in freezing point of snow

  • 2. 
    For carrying reverse osmosis for desalination of water the material used for making semipermeable membrane is

  • potassium nitrate
  • parchment membrane
  • cellulose acetate
  • cell membrane

  • 3. 
    What will be the degree of dissociation of 0.1 M Mg(NO

  • 75%
  • 87%
  • 100%
  • 92%

  • 4. 
    Which of the following units is useful in relating concentration of solution with its vapour pressure?

  • Mole fraction
  • Parts per million
  • Mass percentage
  • Molality

  • 5. 
    At equilibrium the rate of dissociation of a solid solute in a volatile liquid solvent is

  • less than the rate of crystallisation
  • greater than the rate of crystallisation
  • equal to the rate of crystallisation
  • zero
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