Class XII

Which among the following is soluble in water?
  1. Formic acid
  2. Phenol
  3. Benzene
  4. Chloroform
A solution showing a large positive deviation from ideal behaviour has
  1. higher boiling point than both the components
  2. ΔHmixΔHmix is negative
  3. Lower boiling point than both the components
  4. None of these
If the temperature of an aqueous solution increases, it will cause
  1. Decrease in % w/w
  2. Decrease in molarity
  3. Decrease in mole fraction
  4. Decrease in molality
The rate at which a solid dissolves in liquid does not depend on
  1. Concentration
  2. Particle size
  3. Temperature
  4. Pressure
Molarity is preffered over molarity in handling solutions in chemistry laboratory because
  1. Molarity changes with pressure
  2. Molality changes with temperature
  3. Molality changes with pressure
  4. Molarity changes with temperature
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