1. _______ acid is responsible for the 'fizz' in soft drinks.   Oxalic   Carbonic   Citric   Acetic   Hint Half-n-half Clue   2. _______ hydroxide is also known as 'Caustic Potash'.   Sodium   Magnesium   Calcium   Potassium   Half-n-half Clue   3. _______ acid is the chemical name of Vitamin C.   Tartaric   Ascorbic   Oxalic   Boric   Half-n-half Clue   4. Aqua Regia contains concentrated Nitric acid and concentrated Hydrochloric acid in the ratio 1:3.   True   False   5. Vinegar is very dilute _______ acid.   citric   acetic   carbonic   phosphoric   Half-n-half Clue   6. Which of the following salts is insoluble in water?   Barium chloride   Ammonium carbonate   Zinc sulfide   Potassium phosphate   Half-n-half Clue   7. Milk contains _______ acid.   boric   citric   lactic   oxalic   Half-n-half Clue