what is the cation ??

9. Cation whose sulphide salt is canary yellow ppt. 10. Cation escapes from group IV to group III 11. Cation from group Il soluble in dil HNO3 and forms a white precipitate with ammonia. 12. Cation that has a brick red colour in Bunsen flame 13. May be precipitated together with group Ill owing to aerial oxidation 14. Cation from group Il that forms reddish brown ppt with potassium ferrocyanide. 15. Group V reagents includes ammonium chloride to prevent its precipitation 16. React with I-giving white precipitate in brown solution 17. Reacts with iodide to give Nessler's Reagent 18. Cation from group I that forms a white precipitate with dil. HCI soluble in ammonia. 19. Cation from silver group that forms a white precipitate with dil. HCI soluble on hot. 20. Cation from group I that forms a white precipitate with dil. HCI changes to black precipitate with ammonia. 21. Cation from group I has the lowest solubility product. 22. Cation from acid Sulphide group precipitated as black ppt insoluble in dil HNO3 23. Cation escapes from silver group to acid Sulphide group. 24. Cation from ammonium hydroxide group that forms a blood red color with NH4SCN 25. Cation from group. III has high Ksp which oxidized to can be ppt with group III 26. Cation from group III precipitated as white gelatinous ppt has an amphoteric character 27. Cation from group III precipitated as greyish green ppt has an amphoteric character 28. Cation from group Ill that forms Prussian blue ppt with potassium ferrocyanide. 29. Cation has purple color which reduced by H202 30. Cation forms purple color with red lead 31. Cation from ammonium sulphide group precipitate as buff ppt 32. Cation from group IV precipitate as red ppt with pot ferricyanide. 33. Cation from zinc group forms blue color in ether layer by Vogel test 34. Cation from ammonium sulphide forms red ppt with dimethyl glyoxime 35. Cation from alkaline earth group has higher Ksp so need more SO42-ion conc. to ppt 36. Cation from ammonium carbonate group ppt as the chromate soluble in acetic acid 37. Cation from group V form double salt with ammonium sulphate which is soluble. 38. Cation that has an apple green colour in Bunsen flame. 39. Cation that has a violet colour in Bunsen flame. 40. Cation from group VI that forms a yellow ppt with sodium cobaltinitrite.