1. Baryllium Sulphate is less soluble in water due to
  A.  Low Energy of dissociation
  B.  High inflammable energy
  C.  Low inflammable energy
  D.  Ionic Bond
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2. What is the name of thyat system, which uses radioactivity to decide the period of materials of pre historic period
  A.  Carbon dating
  B.  Uranium dating
  C.  Radium dating
  D.  Deuterium dating
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3. Cement is made hard with
  A.  dehydration
  B.  Polymerisation
  C.  Dissociation of water
  D.  hydration and dissociation of water
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4. In which of the following states maximum iron ore is found?
  A.  FeCO3
  B.  Fe3O3
  C.  Fe2O3
  D.  FeS2
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5. Fertiliser having high nitrogen content is:
  A.  Urea
  B.  Ammonium nitrate
  C.  Ammonium sulphate
  D.  Calcium citrate
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6. Where does the oxygen that keeps us alive come from?
  A.  Carbon dioxide
  B.  Carbonates absorbed from soil
  C.  Water
  D.  Oxides of minerals
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7. The gas used for artificial fruit ripening of green fruit is
  A.  Methane
  B.  Acetylene
  C.  Ethane
  D.  Ethylene
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8. The three elements most needed in common fertilisers are:
  A.  Sulphur, Phosphorous and Sodium
  B.  Nitrogen, Potassium and Phosphorous
  C.  Phosphorous, Sodium and Nitrogen
  D.  Calcium, Phosphorous and Potassium
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9. Which one of the following metals pollutes the air of a city having large number of automobiles?
  A.  Lead
  B.  Chromium
  C.  Cadmium
  D.  Copper
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10. An atomic pile is used for
  A.  producing X-rays
  B.  conducting thermonuclear fusion
  C.  conducting nuclear fission
  D.  accelerating atoms
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