Chemical Reactions And Equations

2. A chemical reaction in which two compounds exchange ions and form two new compounds
4. The number written in front of a chemical formula in a balanced equation
5. A process in which one or more substances react to form new substances with different properties.
6. A substance that undergoes change in a chemical reaction
7. Eating up of metals as a result of their exposure to air, moisture and other gases in the atmosphere
8. The process of breaking down a substance using electricity
10. Reactions in which insoluble salts are formed
12. The substance that is added to a solution to bring about a chemical reaction
13. The chemical reaction that involves the transfer of electrons between two substances
14. Process which involves gain of oxygen or loss of hydrogen
15. A chemical reaction in which heat is released
16. The oxidation of oils or fats in food resulting in bad taste and smell
17. A chemical reaction in which a single compound breaks down into two or more simpler substances

1. The type of reaction in which two or more substances combine to form a single substance
3. Process which involves gain of hydrogen or loss of oxygen
8. The chemical reaction that absorbs heat from its surroundings
9. The type of reaction in which oxygen combines with another substance to produce heat and light
11. A substance that is formed as a result of a chemical reaction