Class VI

Most countries make use of _________ for making coins
  1. Copper
  2. aluminum
  3. steel
  4. iron
Gas used in electrical generators as a rotor coolant is
  1. nitrogen
  2. carbon
  3. hydrogen
  4. oxygen
Elements that does not conduct heat and electricity very well are known as
  1. solid
  2. metal
  3. non-elastic
  4. non-metal
Third naturally occurring allotrope of carbon is
  1. Copper
  2. stone
  3. diamond
  4. pearl
A technique in which two liquids are separated by heating process is known as
  1. distillation
  2. chromatography
  3. filtration
  4. evaporation
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