Across
- 1. ________ solution turns blue litmus red
- 3. This bond is formed when metals transfer electrons to non-metals
- 6. This cation forms a white ppt when a few drops of aqueous NaOH is added but the ppt dissolves and forms a colourless solution when aqueous NaOH is added in excess
- 9. This is the reaction between acids and bases
- 10. pungent gas that turns moist red litmus paper blue
- 11. Acids react with ________ to form salt and hydrogen gas
- 14. Most ________ salts are insoluble (in water) except Sodium, Potassium, Ammonium
- 16. Negatively charged particles
- 21. This gas turns purple acidified potassium manganate (VII) colourless
- 22. _________ oxides can react with both acids and alkalis
- 23. All ________ salts are soluble (in water)
Down
- 2. This bond is formed when non-metals share electrons
- 4. These are oxides that have neither acidic nor basic properties
- 5. Most _________ salts are soluble (in water) except Calcium, Lead and Barium
- 7. An atom is electrically ________ - number of electrons is equal to number of protons
- 8. This is formed acidified silver nitrate is added to a solution containing chloride ions
- 12. The process when a substance changes its state from gas to liquid
- 13. Testing for this ion by adding aqueous NaOH followed by aluminium powder
- 15. Most _________ salts are insoluble (in water) except Calcium, Barium, Sodium, Potassium and Ammonium
- 17. Atoms of the same element that have the same atomic number but different mass number
- 18. Positively charged particles
- 19. Most ________ salts are soluble (in water) except Sodium, Mercury and Lead
- 20. Light blue ppt is formed when aqueous Ammonia is added but upon adding in excess, the ppt dissolves to give a dark blue solution