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Chemical used in photography is

  • sodium sulphate
  • sodium sulphite
  • sodium thiosulphate
  • sodium oxalate
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1. Acid rain is due to air pollution by ?

  • Carbon dioxide
  • Carbon monoxide
  • Methane
  • Nitrous oxide and Sulphur dioxide

2. The most malleable metal is

  • platinum
  • silver
  • gold
  • iron

3. Which have maximum number of isotopes ?

  • Bromine
  • Aluminium
  • Polonium
  • Carbon

4. The cyclotron is used to

  • accelerating particles
  • separating elements
  • purifying metals
  • making alloys

5. Which have the maximum density ?

  • Water
  • Benzene
  • Ice
  • Chloroform
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