These chemistry questions will surely help you in your competitive exams. 1. What nature of flame is emitted when a ribbon of magnesium is combusted? - White shiny 2. Which acid is found in vinegar? - Acetic acid 3. Which of the following is an alien compound? - Plaster of Paris 4. Approximate pH value of lemon juice? - 2.2 is 5. With which substance is it beneficial to treat bee stings? - Baking soda 6. What kind of brushing should be done to clean the mouth so that dentistry can be stopped? - Alkaline dentin 7. Which of the following is the conductor of nonmetal electricity? - Graphite 8. Which of the following metals can be cut with a knife? - Sodium 9. Is zinc ore? - Zinc blade 10. Which gas accumulates at the anode after electromagnetic decomposition of alumina? - Oxygen gas 11. What percentage of carbon is in steel? - 2 % 12. Which metal does not react with oxygen even at higher temperatures? - Gold 13. Which metal starts floating when put in water? - Calcium Also Read- GK questions: Important questions related to Biology These general awareness questions will help you in competition exam preparations GK Quiz: Questions and Answers on Rivers of India