The range of normal human hearing is in the range of
A) 10 Hz to 80 Hz
B) 50 Hz to 80 Hz
C) 50Hz to 15000 Hz
D) 15000 Hz and above
Correct Answer:
Verified
Q2: The pollution which does not persistent harm
Q3: Soap and detergents are the source of
Q4: Growing agricultural crops between rows of planted
Q5: The main atmospheric layer near the surface
Q6: Man made sources of radiation pollution are:
A)mining
B)explosion
Q7: The cutting down of trees and setting
Q8: Percentage of forest area recommended by the
Q9: Example of primary pollutant
A)SO2
B)NO2
C)CO
D)hydrocarbons
Q10: Commonly used radioactive isotopes in scientific research
A)14
Q11: Drinking of fluoride containing water results :
A)fluorosis
B)chlorosis
C)minemata
D)methaemoglobinema
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