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What among following is used to produce artificial rain ?

  • copper oxide
  • carbon monoxide
  • silver iodide
  • silver nitrate
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1. Nail polish remover contains ?

  • benzene
  • acetic acid
  • acetone
  • petroleum ether

2. Iodine can be separated from a mixture of Iodine and Potassium Chloride by ?

  • Filtration
  • Sublimation
  • Distillation
  • Sedimentation

3. The metallurgical process in which a metal is obtained in a fused state is called ?

  • roasting
  • calcinations
  • smelting
  • froth floatation

4. Which of the following is produced during the formation of photochemical smog ?

  • Nitrogen Oxides
  • Hydrocarbons
  • Methane
  • Ozone

5. Why is phosphorus kept under water ?

  • to make it wet
  • to make it durable
  • water forms a protective coating on it
  • to save it from catching fire when exposed to dry air
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