Class XII

Fog is a colloidal solution of
  1. Liquid in gas
  2. Gas in liquid
  3. Gas in gas
  4. Solid in gas
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 enhances the activity of a catalyst is known as
  1. Poisons
  2. Coenzyme
  3. Promoters
  4. Inhibitors
Which of the following processes does not involve a catalyst?
  1. Oswald process
  2. Haber process
  3. Contact process
  4. Thermite process
Which among the following is a property of physisorption?
  1. Non – specific in nature
  2. All of the above
  3. High enthalpy of adsorption
  4. Irreversibility
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