Which gas has the highest concentration in the Earth's atmosphere?
A) N2
B) O2
C) Ar
D) CO2
E) O3
Correct Answer:
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Q2: Which water pollutant can lead to an
Q3: Which water pollutant is responsible for algal
Q4: The minimum wavelength of light required
Q5: Which of the following is not responsible
Q6: Which of the following is the main
Q8: The conversion (fixation)of N2 to its compounds
Q9: All of the following are used by
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Q12: The largest
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