Noise or Noise pollution measured in:
A). Phon
B). Deci
C). Decibel
D). Decimal
1. Which of the following metals occurs In free state ?
2. Dry ice is
3. Sea weeds are important source of
4. During inspiration, as a result of contraction of muscles attached to it, the diaphragm
5. The Instrument used to see the distant objects on the Earth is
6. What are the major pollutants of cigarette smoke?
7. Water can be separated from alcohol water mixture by
8. Bleaching action of moist sulphur dioxide is because of its