GUESS US!

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Across
  1. 4. metals react with acids to produce this gas
  2. 8. raw materials of petroleum origin
  3. 9. type of combustion in which large amount of heat and light are released in a very short span of time
  4. 10. also called as artificial silk
  5. 11. almost pure form of Coal
  6. 12. A chemical process in which a substance reacts with oxygen to give off heat is called
Down
  1. 1. Each small unit of Polymer is
  2. 2. Examples are Bakelite and Melamine
  3. 3. replaces copper in ZnSO4 formation
  4. 5. can be easily transported through pipes
  5. 6. The property of metal by which it can be drawn into wires
  6. 7. forst fully synthetic fabric
  7. 8. also called as crude oil