chemistry based questions
DIRECTIONS : Questions based on Chemistry.
76. Which among the following is in liquid state at normal room temperature?
  A.  Sodium
  B.  Mercury
  C.  Copper
  D.  Phosphorous
77. The chemical name of quartz is
  A.  Sodium silicate
  B.  Sodium phosphate
  C.  Calicum phosphate
  D.  Calcium oxide

78. What is the most common element in the universe?
  A.  Iron
  B.  Oxygen
  C.  Helium
  D.  Hydrogen
79. Who was the father of chemistry?
  A.  Robert Boyle
  B.  Cavendish
  C.  Lister
  D.  Urey
80. Which one of the following is a protein fibre?
  A.  Nylon
  B.  Silk
  C.  Polyester
  D.  Cotton