Question

Choose the correct answer from the given alternatives.
The largest reservoir of nitrogen on the earth is:

• A. Soil
• B. Oceans
• C. Air
• D. Granite rocks

Answer 1

The correct option is C Air

Nearly 78% of the Earth's atmosphere is nitrogen. Apart from this, nitrogen is an indispensable part of many biomolecules like proteins, nucleic acids, vitamins, etc. It is also found in small quantities in biologically important compounds like ammonia and urea. However, air which contains 78% of nitrogen is the largest reservoir of nitrogen.

So, the correct answer is 'C'.