Class XII

Enzymes are
  1. Very active vegetable catalyst
  2. Synthetic catalyst
  3. Catalyst found in organisms
  4. Substances made by chemists to activate washing powder
Substances that alter the rate of a chemical reaction without being used up in a chemical reaction is known as
  1. -----Promoters -------------------------------------------------------- Promoters--------------------------------------------------- Promoters
  2. Catalyst
  3. Poisons
  4. Inhibitors
Which one of the following is an example of micelle system?
  1. Soap and water
  2. Protein and water
  3. Rubber and benzene
  4. None of these
In aerosol the dispersion medium is
  1. Solid
  2. None of these
  3. Gas
  4. Liquid
The example of heteropolar solution is
  1. Sulphur solution
  2. Starch solution in water
  3. Protein solution in water
  4. Rubber solution in water
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