Across
- 1. Common effect of aerial oxidation on metals.
- 5. Reaction in which two reactants form a single product.
- 8. Colour of the solution obtained when iron is kept in copper sulphate solution.
- 10. Symbolic representation of a chemical reaction.
- 11. Colour of precipitate formed when lead nitrate reacts with potassium iodide.
- 12. colour of fumes given out when lead nitrate is heated.
Down
- 2. Addition of oxygen.
- 3. Reaction when two compounds exchange their ions.
- 4. Reaction taking place when calcium carbonate is heated.
- 6. Occurs when barium chloride reacts with sodium sulphate.
- 7. This is what a chemical equation should always be.
- 9. Addition of hydrogen.