Home

Brass gets discoloured in air due to the presence of which gas in air

A. Carbon dioxide

B. Hydrogen Sulphide

C. Oxygen

D. Nitrogen

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  2. The major ingredient of leather is
  3. Which of the following elements is non-radioactive?
  4. Permanent hardness of water can be removed by adding
  5. Quartz crystals normally used in quartz clocks etc. is chemically
  6. Cell membrane is
  7. Epoxy resins is used as
  8. Which of the following is the lightest metal ?
  9. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  10. Brass gets discoloured in air due to the presence of which gas in air
  11. The oxide of Nitrogen used in medicine as anaesthetic is
  12. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  13. According to Daltons atomic theory the smallest particle which can exist independently is
  14. Which of the following characters is not shown by hydrogen
  15. The metal used in storage batteries
  16. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  17. The fastest-running terrestrial animal is
  18. What is the unit for measuring the pitch or frequency of sound ?
  19. The location and energy of an electron in an atom can be specified by
  20. When a gas is turned into a liquid, the process is called
  21. Which of the following is commonly called a polyamide ?
  22. The solar eclipse occurs when
  23. The type of glass used in making prisms and lenses is
  24. Rust is
  25. The colour of Emerald is
  26. Which of the following is in liquid form at room temperature ?
  27. The metallic constituents of hard water are
  28. Bromine is
  29. The recent atomic weight scale is based on
  30. The removal of top soil by water or wind is called