Chemistry Puzzle

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Across
  1. 2. What is the most common isotope of hydrogen(9)
  2. 5. Acid released by bees in a bee sting; other name of formic acid(13)
  3. 7. What is called indian saltpeter(13)
  4. 11. Name the indicator which turns red when added to base(8)
  5. 12. Catalytic converters are generally made of(16)
  6. 14. Most commonly used bleaching agent is(8)
Down
  1. 1. Copper loses lusture due to the formation of(15)
  2. 3. Acid having pH value of 4(10)
  3. 4. Strongest oxidizing agent(8)
  4. 6. Stearic acid is present in(4)
  5. 8. What is used in medicines for treating indigestion(7)
  6. 9. pH of concentrated HCl is(4)
  7. 10. What colour would hydrochloric acid (ph 1) turn universal indicator into(9)
  8. 12. No. of water molecules in GYPSUM as water of crystallisation is(3)
  9. 13. Malic acid is present(6)