Home

Which of the following is known as freon?

A. Liquid ammonia

B. Carbon tetrafluoride

C. Dichloro-difluoro-methane

D. Sulphur dioxide

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

You can do it
  1. The solar wind is composed of
  2. Hot water is poured simultaneously in four metallic tumblers painted outside with different paints.…
  3. Which of the following pairs is not correct?
  4. In the fuse of an electrical installation blows out
  5. The red colour of the setting sun is due to
  6. The device that is used to measure the electromotive force of a cell is
  7. Which of the following apparatus is used in the electrolysis of water?
  8. It is difficult to bon potatoes at the top or a mountain because
  9. The overhead wires supported by high towers in the grid system carry
  10. The Cact that the compass needle does not point true north was observed first by
  11. The source of electric energy in an artificial satellite is
  12. The star nearest to the sun is
  13. The radiator in a car serves to
  14. When a bullet is fired from a gun
  15. The property of a fluid by which it resists relative motion within itself is known as
  16. Railway tracks are banked on curves so that
  17. The brightest planet in the Solar System is
  18. The electroplating of a metallic article
  19. The brightest star visible to the naked eye is
  20. Meteors
  21. A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it…
  22. A rheostat is used
  23. Air pressure is usually highest when the air is
  24. The following are the atmospheric zones above the surface of the earth:A) Troposphere B) IonosphereC)…
  25. X-rays are used
  26. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching…
  27. When the disturbed electrons of an exited atom transfer back into lower energy levels they emit energy…
  28. To produce beats it is necessary to have two waves
  29. When a whistling engine approaches a person standing on the platform, the frequency or the note
  30. Two tumblers stuck together can be separated by