Surface Chemistry Test

Surface Chemistry

This is surface chemistry Test-05 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which catalyst is used in contact process?
  • A
    Vanadium pentoxide
    Correct
  • B
    Molybdenum
  • C
    Platinum
  • D
    Iron
2
Catalyst used in hydrogenation of vegetable oil is
  • A
    Vanadium
  • B
    Molybdenum
  • C
    Nickel
    Correct
  • D
    Platinum
3
The activity of the iron catalyst used in Haber’s process is adversely affected due to presence of
  • A
    $N_2$
  • B
    CO
    Correct
  • C
    $CO_2$
  • D
    $H_2$
4
The example of heteropolar solution is
  • A
    Starch solution in water
  • B
    Sulphur solution
  • C
    Rubber solution in water
  • D
    Protein solution in water
    Correct
5
Which one of the following is an example of micelle system?
  • A
    None of these
  • B
    Rubber and benzene
  • C
    Protein and water
  • D
    Soap and water
    Correct
6
Metals like silver and copper can be obtained in the colloidal state by
  • A
    Dialysis
  • B
    Bredig’s arc method
    Correct
  • C
    Coagulation
  • D
    Peptization
7
Gelatine is often used as an ingredient in the manufacture of ice cream for
  • A
    Causing mixture to solidify
  • B
    Improving the flavour
  • C
    Stabilizing the colloidal system and preventing the growth of crystal
    Correct
  • D
    Preventing formation of colloid
8
Artificial smoke screens used in the warfare are colloidal dispersion of
  • A
    Sodium oxide
  • B
    Lead oxide
  • C
    Titanium oxide
    Correct
  • D
    Aluminium oxide
9
The emulsifying agent present in milk that makes it stable is
  • A
    All of the above
  • B
    Casein
    Correct
  • C
    Lactose
  • D
    Maltose
10
Hardening of leather in tanning industry is based on
  • A
    Electro – osmosis
  • B
    Electrophoresis
  • C
    Mutual coagulation
    Correct
  • D
    Thermosetting
11
An example of autocatalysis is
  • A
    Oxidation of oxalic acid by acidified $KMnO_4$
    Correct
  • B
    Oxidation of $SO_2$ to $SO_3$
  • C
    Oxidation of NO to $NO_2$
  • D
    Decomposition of $KClO_3$ to KCl and $O_2$
12
Decomposition of ${H_2}{O_2}$ can be prevented in the presence of
  • A
    Nickel
  • B
    Sulphuric acid
  • C
    Palladium
  • D
    Glycerol
    Correct
13
Liquid – liquid solutions are known as
  • A
    Gel
  • B
    Foam
  • C
    Aerosols
  • D
    Emulsions
    Correct
14
Substances that alter the rate of a chemical reaction without being used up in a chemical reaction is known as
  • A
    Catalyst
    Correct
  • B
    Promoters
  • C
    Inhibitors
  • D
    Poisons
15
Enzymes are
  • A
    Substances made by chemists to activate washing powder
  • B
    Very active vegetable catalyst
  • C
    Catalyst found in organisms
    Correct
  • D
    Synthetic catalyst