CHEMISTRY PAST PAPER : 8462/2H ASSESMENT EXAMS WITH CORRECT QUESTIONS AND ANSWERS.

1. What colour flame does sodium produce? - CORRECT ANSWERS️️yellow 2. what metal ion produces a green flame? - CORRECT ANSWERS️️copper ions 3. What is used to help identify metal ions with reduced bias? - CORRECT ANSWERS️️Flame emission spectroscopy 4. How to test for bromide ions? - CORRECT ANSWERS️️Add silver nitrate and dilute nitric acid to solution : 5. cream precipitate formed 6. How to test for sulfate ions? - CORRECT ANSWERS️️Add Barium Chloride and Hydrochloric acid 7. white precipitate formed. 8. Define formulation - CORRECT ANSWERS️️a mixture that has been designed as a useful product 9. Why are coloured chemicals added to spirits/formulations? - CORRECT ANSWERS️️to deter people from consuming it 10. how is ethanol produced from a sugar solution? - CORRECT ANSWERS️️Fermentation with yeast through anaerobic respiration/lack of oxygen 11. What reacts with an alcohol to produce a carboxylic acid ? - CORRECT ANSWERS️️an oxidising agent 12. functional group of alcohols? - CORRECT ANSWERS️️-OH 13. functional group of carboxylic acids? - CORRECT ANSWERS️️-COOH 14. Processes that lead to change in the Earths atmosphere? - CORRECT ANSWERS️️volcanic activity > water vapour increased 15. water vapour condensed to form seas