1. _______ is a basic gas which is used in the manufacture of fertilizers such as Urea.   Chlorine   Ammonia   Nitrogen   Oxygen   Hint Half-n-half Clue   2. _______ acid is the chemical name of Vitamin C.   Boric   Oxalic   Ascorbic   Tartaric   Half-n-half Clue   3. Acids are bitter in taste.   True   False   4. Antacids produced in the stomach chiefly contain two bases, namely _______ hydroxide and Aluminum hydroxide.   Magnesium   Sodium   Potassium   Calcium   Half-n-half Clue   5. _______ acid is used in the manufacture of many car batteries.   Hydrochloric   Phosphoric   Nitric   Sulfuric   Half-n-half Clue   6. _______ hydroxide is also known as 'Caustic Potash'.   Magnesium   Calcium   Sodium   Potassium   Half-n-half Clue   7. _______ acid is responsible for the 'fizz' in soft drinks.   Carbonic   Oxalic   Citric   Acetic   Half-n-half Clue