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Across 4. The ion that is tested for using lime water 9. The colour produced when bromine is added to an unsaurated hydrocarbon 11. The scientific name for an insoluble solid 12. The colour of the flame produced when testing for Barium ions 15. The coloured ppt produced by Cl- ions (halide) 16. The chemical that is used to test for sulphate ions 17. The coloured ppt produced by I- ions (halide)

Down 1. The colour of the flame produced when testing for Calcium ions 2. The alkali used to test for aluminium ions 3. The colour of the flame produced when testing for Sodium ions 5. The colour of the flame produced when testing for Potassium ions 6. The coloured ppt produced when Cu 2+ ions are added to a few drops of NaOH 7. The chemical that is used to test for halide ions 8. The metal ion that redissolves when excess NaOH is added 10. The coloured ppt produced when Fe 2+ ions are added to a few drops of NaOH 13. The coloured ppt produced by Br- ions (halide) 14. The coloured ppt produced when Fe 3+ ions are added to a few drops of NaOH