Light scattering takes place in:  

Question: Light scattering takes place in:   (a) Colloidal solutions (b) Acidic solutions (c) Electrolyte solutions (d) Basic solutions Answer: (a) Colloidal solutions

The elements of a group in the periodic table:

Question: The elements of a group in the periodic table: (a) Have similar chemical properties (b) Have consecutive atomic numbers (c) Are isobars (d) Are isotopes Answer: (b) Have consecutive

Air is:

Question: Air is: (a) Always a compound (b) Always mixture (c) A compound in pollution free zones (d) A mixture in industrial zones Answer: (b) Always mixture

Chlorination is:

Question: Chlorination is: (a) A process of converting chlorides into chlorine (b) Adding small amounts of chloride to contaminated water (c) A chemical reaction in which chlorine is formed (d)

The gas used in a refrigerator is:

Question: The gas used in a refrigerator is: (a) Cooled down on flowing (b) Heated up on flowing (c) Cooled down when compressed (d) Cooled down when expanded Answer: (d)

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