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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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  17. Water has maximum density at
  18. What is the unit for measuring the pitch or frequency of sound ?
  19. Liquefied Petroleum gas (LPG) consists of mainly
  20. Which of the following elements is obtained from sea weeds ?
  21. The most important ore of Aluminium is
  22. The metal that is present in Photo Films is
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  24. Which of the following elements is a metal
  25. The fastest acting enzyme in the biological kingdom is
  26. Nitrification means
  27. The metallic constituents of hard water are
  28. The oxide of Nitrogen used in medicine as anaesthetic is
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