Class X

Raw materials for production of urea are
  1. ammonia and carbon dioxide
  2. oxygen and carbon dioxide
  3. ammonia and oxygen
  4. ammonia and phosphate
Color of crude oil is
  1. brownish black
  2. white
  3. transparent
  4. light yellow
Smelting is
  1. reduction of metal oxides
  2. oxidation of minerals
  3. oxidation of metals
  4. melting of metals
In magnetic separation, magnets are used to separate
  1. mineral and gangue
  2. metal and mineral
  3. metal and gangue
  4. iron and steel
A reversible reaction
  1. always completes
  2. never goes to completion
  3. Spontaneous reactions
  4. non spontaneous reactions
Time Elapsed

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