Question

Zeolites are alumino-silicates. They can absorb particles upto a certain size and thus behave as sieves for filtering.

• A. Colloids
• B. Molecules
• C. Atoms
• D. Carbon soot in polluted air

Answer 1

The correct option is B Molecules

• Zeolites are microporous crystalline solids with well-defined structures. Generally, they contain silicon, aluminium and oxygen in their framework and cations, water and/or other molecules within their pores.
  
• The major uses of zeolites are in petrochemical cracking, ion-exchange (water softening and purification), and in the separation and removal of gases and solvents. Other applications are in agriculture, animal husbandry and construction. They are often also referred to asmolecular sieves.
  
• Hence option B is the correct answer.