CHEMICAL REACTION

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Across
  1. 3. the rusting of iron is a ________reaction
  2. 4. reactions in which one element takes place of another element in a compound
  3. 6. a kind of reaction that releases energy in the form of heat
  4. 7. when no. of atoms of each element are same on both the sides.
  5. 8. a substance which increases the rate of reaction without changing itself
Down
  1. 1. a new substance i.e. formed or produced after a chemical reaction
  2. 2. the addition of oxygen and the removal of hydrogen to a substance
  3. 5. C+O2 gives CO2 is an example of which reaction