Biogas is obtained during

A. decomposition of petrol

B. fermentation of animal and plant waste

C. destructive distillation of coal

D. electrolysis of water

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  1. The process that takes place in the atom bomb is
  2. In the process of purification of water for town supply, the substance used to remove bad smell and…
  3. Which of the following carbon compounds is used as a fire extinguisher?
  4. Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures…
  5. Smelling salt contains
  6. A non-metal which is a good conductor of electricity is
  7. Clark's method for removal of temporary hardness in water uses
  8. Which of the following process involves removal of the elements of water?
  9. Lunar caustic is
  10. Water has an unusually high bolling point because
  11. Which of the following is baking soda?
  12. Which of the following is not a characteristic of potable water?
  13. The main constituent of gobar gas is
  14. The simplest hydrocarbon is
  15. A substance used as a fire-extinguisher under the trade name of Pyrene is
  16. Tincture iodine is a solution of
  17. The scientist who synthesised the first organic compound (urea) in the laboratory was
  18. The compound used in photography is
  19. The artificial silk produced from cellulose is
  20. Which one of the following is used for dry cleaning?
  21. The gas which has a faint sweet odour is
  22. Consider the following statements: Hard water is not suitable for1) drinking2) washing clothes with…
  23. The formula for cane sugar is
  24. Apart from lead tetra-ethyl, the other compound used as antiknock is
  25. In photography, the compound or nitrogen used is
  26. Which of the following la a very good supporter of combustion?
  27. The term 'nucleons' apples to
  28. Hard water does not lather well with soap because
  29. Setting of cement is due to
  30. Which one of the following is used in dry cleaning of garments?