Question

level 1 q1 which of the following chemical formulas represents the nitrogen in the atmosphere? a. n₂ c. nh₃ b. nh₄ d. no₃ level 1 q3 nitrogen used by plants is in the form of a. nitrites c. nitrous oxide b. nitrates d. nitric

Explanation:

Nitrogen in the atmosphere exists mainly as $N_2$, a di - atomic molecule. Plants use nitrogen mainly in the form of nitrates ($NO_3^-$) which they absorb from the soil. Nitrites ($NO_2^-$), nitrous oxide ($N_2O$) and nitric acid ($HNO_3$) are not the main forms of nitrogen used by plants.

Answer:

Q1: A. $N_2$
Q3: B. Nitrates