Chemical Reactions and Equations

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Across
  1. 3. When two or more reactants combine with each other to form a new product
  2. 4. A reaction that releases energy in the form of light or heat
  3. 5. Coating of zinc over the surface of iron or steel to prevent against rusting
  4. 8. A reaction in which a more reactive element displaces a less reactive element from its compound
  5. 12. A reaction in which heat is absorbed from the surroundings
  6. 13. deterioration of metals by the reaction of water and oxygen with the formation of an oxide layer on the metal surface
  7. 14. A substance that undergoes change in a chemical reaction
  8. 15. The spoiling of food caused by the oxidation of fats and oils present in it
  9. 17. A substance(chemical) which slows down oxidation
  10. 19. Reactions in which oxidation and reduction take place together
  11. 20. A process in which a chemical substance changes because of the addition of oxygen
Down
  1. 1. A chemical reaction in which two compounds exchange positive ions and form two new compounds
  2. 2. A substance which reduces other substances but oxidises itself
  3. 6. Equations with simply the chemical formulas of the products and reactants, no mention of state, and no atom balancing on either side of the equation
  4. 7. Hydrated ferric oxide
  5. 9. A type of decomposition reaction in which the reactant will break down in presence of sunlight
  6. 10. A reaction in which a compound breaks down into two or more simpler substances
  7. 11. The reaction in which decomposition occurs by applying electricity
  8. 16. Substance that speeds up a chemical reaction
  9. 18. The insoluble solid which settles down after the completion of the chemical reaction