Chemistry - Solutions and Surface Chemistry

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Question - 1

Azeotropic mixtures are

  • A mixture of two solids
  • B those which boil at different temperatures
  • C those which can be fractionally distilled
  • D constant boiling mixture

Question - 2

If glycerol and methanol were sold at the same price in market, which would be cheaper for preparing an anti-freeze solution for the radiator of an automobile?

  • A Glycerol
  • B Methanol
  • C Both are equal
  • D None of these

Question - 3

Colloidal solution commonly used in the treatment of eye disease is

  • A colloidal silver
  • B colloidal gold
  • C colloidal antimony
  • D colloidal sulphur

Question - 4

Water is a good solvent. This is due to high

  • A Dielectric constant of water
  • B surface tension of water
  • C specific heat of water
  • D heat of fusion of water

Question - 5

Which of the following colloidal solution is commonly used as germ killer?

  • A Colloidal sulphur
  • B Colloidal gold
  • C Colloidal silver
  • D Colloidal antimony

Question - 6

Butter is a colloid formed when

  • A fat is dispersed in water
  • B fat globules are dispersed in water
  • C water is dispersed in fat
  • D suspension of casein in water

Question - 7

An emulsion is a colloid of a

  • A gas in a liquid
  • B liquid in a liquid
  • C liquid in a gas
  • D gas in a solid

Question - 8

A syringe is a hollow glass tube with lower end tapered to a nozzle. Due to which one of the following liquid can be drawn into a syringe?

  • A Partial vacuum produced inside the glass tube
  • B Diffusion
  • C Surface tension effect
  • D Capillary action

Question - 9

Fog is an example of

  • A gas dispersed in gas
  • B liquid dispersed in gas
  • C solid dispersed in gas
  • D solid dispersed in liquid

Question - 10

Which of the following properties are characteristic of lyophobic sols?

1. Low viscosity

2. High viscosity

3. Reversibility

4. Coagulation by electrolytes at low concentrations

Select the correct answer using the code given below.

  • A 1, 3 and 4
  • B 2 and 3 only
  • C 1 and 4 only
  • D 1 and 3 only