Problem 41 - Objective Biology for NEET

Question

Lightening and UV radiation can cause a reaction between nitrogen and oxygen and produces (a) \(\mathrm{NO}\) (b) \(\mathrm{NO}\), (c) \(\mathrm{N}_{2} \mathrm{O}\) (d) All of these

Step-by-Step Solution

Answer

The correct answer hence is (d) All of these, considering a potential typo in the exercise.

Step 1: Natural nitrogen and oxygen reaction

When lightning or strong ultraviolet (UV) radiation provides enough energy, nitrogen and oxygen can react together. This forms various types of nitrogen oxides, which are two elements compounds that contain nitrogen and oxygen in different proportions.

Step 2: Potential products

Some potential products from this reaction include nitric oxide (\(\mathrm{NO}\)), nitrogen dioxide (\(\mathrm{NO_2}\)), and nitrous oxide (\(\mathrm{N}_2 \mathrm{O}\)). Each of these compounds have different proportions of nitrogen and oxygen.

Step 3: Evaluate the options

Looking at our options: (a) \(\mathrm{NO}\) - Nitric Oxide, (b) \(\mathrm{NO}\) - Nitric Oxide again (it might be a typo), (c) \(\mathrm{N}_2 \mathrm{O}\) - Nitrous Oxide, and (d) All of these. Considering the possible compounds formed during the reaction between nitrogen and oxygen when provided with high energy, we can see that both options (a) and (c) can potentially be formed. This means (d) All these can be correct, if we assume that option (b) was meant to be \(\mathrm{NO_2}\) - Nitrogen Dioxide.

Key Concepts

Nitric Oxide (NO)

Nitric Oxide, represented by the chemical formula \(\mathrm{NO}\), is an important molecule in atmospheric chemistry and human biology.
In the atmosphere, \(\mathrm{NO}\) is formed naturally when nitrogen and oxygen react under high energy conditions.
Such conditions occur during lightning storms or due to ultraviolet radiation.Here's what you should know about \(\mathrm{NO}\):

• It consists of one nitrogen atom and one oxygen atom.
• This molecule is relatively stable but can quickly react with oxygen to form nitrogen dioxide \(\mathrm{NO}_2\).
• In the human body, \(\mathrm{NO}\) plays a key role as a signaling molecule, involved in processes like regulating blood pressure and immune responses.

In the atmosphere, \(\mathrm{NO}\) is a precursor to various other nitrogen oxides, contributing to the formation of smog and acid rain, highlighting its environmental impact.

Nitrogen Dioxide (NO₂)

Nitrogen Dioxide, \(\mathrm{NO}_2\), is part of a group of gaseous pollutants known as nitrogen oxides.
It is formed when nitric oxide \(\mathrm{NO}\) reacts with oxygen in the air, which can happen easily under ambient conditions.Key points about \(\mathrm{NO}_2\):

• It is a reddish-brown gas with a distinctive sharp, biting odor.
• The molecule consists of one nitrogen atom and two oxygen atoms.
• \(\mathrm{NO}_2\) contributes to the formation of ground-level ozone, which is a component of smog.
• It poses health risks as it can irritate respiratory systems and is linked to lung diseases.

Since \(\mathrm{NO}_2\) is both a product and a precursor in various atmospheric reactions, it plays a significant role in air pollution.
Reducing emissions of \(\mathrm{NO}_2\) is crucial for improving air quality and protecting public health.

Nitrous Oxide (N₂O)

Nitrous Oxide, often referred to as "laughing gas," has the chemical formula \(\mathrm{N}_2 \mathrm{O}\).
It is a colorless gas with a slightly sweet odor and taste.Here are important aspects of \(\mathrm{N}_2 \mathrm{O}\):

• The molecule contains two nitrogen atoms and one oxygen atom.
• It is used medically for its anesthetic and analgesic effects, often during dental procedures.
• \(\mathrm{N}_2 \mathrm{O}\) is also a significant greenhouse gas, contributing to global warming more potently than carbon dioxide.
• Natural emissions from bacteria in soils and oceans are major sources of \(\mathrm{N}_2 \mathrm{O}\) in the atmosphere.

Efforts to minimize \(\mathrm{N}_2 \mathrm{O}\) emissions focus largely on reducing its release from agricultural activities, where it arises from fertilizer application.
Understanding its climatic impact rests on its ability to trap heat in the atmosphere.