Chemical reaction

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Across
  1. 2. OILRIG
  2. 7. reverse of combination
  3. 8. absorption of heat
  4. 9. law of mass action
  5. 10. single substance
Down
  1. 1. heat is evolved
  2. 3. reactivity of metals
  3. 4. insoluble
  4. 5. oxidation reaction
  5. 6. Nitrogendioxide