Essential Chemistry for IGCSE - Air And Water (Section 7 - No. 41)
What is the primary function of the process of 'denitrification' in the nitrogen cycle?
To convert nitrogen into compounds that plants can use.
To release nitrogen gas back into the atmosphere.
To remove nitrogen compounds from the soil.
To store nitrogen in the soil.
Explanation
Denitrification converts nitrogen compounds back to nitrogen gas, releasing it into the atmosphere, as per the text.
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