In: Chemistry
please match nitrogen from the phrase that best describes it:
_Most abundant form of nitrogen
_disrupts 03-o2 equilibrium and is a greenhouse gas
_most oxidized form of nitrogen
1. NO
2. N2
3. N2O
4.NO3
5.HNO2
Ans. 1. Most abundant form of Nitrogen is N2 N2 constitutes around 78% of the atmospheric gases.
Ans. 2. Nitrous oxide (N2O) is a greenhouse gas. Rest of the gases listed here are not greenhouse gas.
N2O exhibits photolysis in presence of UV rays in stratosphere as follows-
N2O ------UV (hv)---------> NO + O
Nascent oxygen (O) further reacts with nitrous oxide to produce nitric oxide as follows-
N2O + O -------------> 2 NO
The product, nitric oxide (NO) further reacts with ozone (O3) to produce nitrogen dioxide (NO2) which further reacts ozone.
NO + O3 -------> NO2 + O2
NO2 + O3 --------> NO3 + O2
Through this chain reaction, nitrous oxide (N2O) disrupts the ozone layer (O3- O2 equilibrium in the ozone layer).
Ans. 3. NO – Oxidation number of N-atom = +2
N2 – Oxidation number of N-atom = 0
N2O – Oxidation number of N-atom = +1
NO3- – Oxidation number of N-atom = +5
HNO2 – Oxidation number of N-atom = +3
Thus, NO3- is the most oxidized from of nitrogen because of having highest oxidation number.