Chemistry

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)

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