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What is the unit for measuring the pitch or frequency of sound ?

A. Coulomb

B. Hum

C. Cycles

D. Decible

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  2. Bromine is
  3. Old-written material, which cannot be read easily can be read by
  4. Brass gets discoloured in air due to the presence of which gas in air
  5. The element present in the largest amount in rocks and minerals is
  6. Which of the following elements is a metal
  7. Polythene is industrially prepared by the polymerisation of
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  9. The formula of Plaster of Paris is
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  11. What is the unit for measuring the pitch or frequency of sound ?
  12. The location and energy of an electron in an atom can be specified by
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  15. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
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  17. Which of the following is the lightest metal ?
  18. The chemial name of Uria is
  19. When a gas is turned into a liquid, the process is called
  20. Cell membrane is
  21. Nitrification means
  22. The type of glass used in making prisms and lenses is
  23. The solar eclipse occurs when
  24. The Panda belongs to the same family as that of
  25. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  26. The recent atomic weight scale is based on
  27. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  28. The smallest functional and structural unit of kidney is called as
  29. The metal used in storage batteries
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