Problem 10 - 43 Years JEE ADVANCED (1978-2020) + JEE MAIN Chapterwise & Topicwise Solved Papers Chemistry

Question

Excessive release of \(\mathrm{CO}_{2}\) into the atmosphere results in: (a) global warming (b) polar vortex (c) formation of smog (d) depletion of ozone

Step-by-Step Solution

Answer

The answer is (a) global warming.

Step 1: Understanding the Question

We need to determine the consequence of excessive release of \(\text{CO}_2\) into the atmosphere from the given options (a) global warming, (b) polar vortex, (c) formation of smog, and (d) depletion of ozone.

Step 2: Analyzing the Effect of CO2

Carbon dioxide (\(\text{CO}_2\)) is a greenhouse gas, meaning it traps heat in the atmosphere. This trapping causes the Earth's temperature to rise, a phenomenon known as global warming.

Step 3: Evaluating Each Option

Let's evaluate each option: - (a) Global warming is caused by increased levels of \(\text{CO}_2\).- (b) Polar vortex refers to cold air currents, not directly linked with \(\text{CO}_2\).- (c) Smog is typically caused by pollutants like \(\text{NO}_x\) and volatile organic compounds, not \(\text{CO}_2\) alone.- (d) Ozone depletion is primarily due to chlorofluorocarbons (CFCs) and not \(\text{CO}_2\).

Step 4: Conclusion

Based on the analysis, the correct option that results from excessive release of \(\text{CO}_2\) is global warming.

Key Concepts

Greenhouse Gases

Greenhouse gases play a vital role in regulating the Earth's temperature by trapping heat from the sun in the Earth’s atmosphere. This process is called the greenhouse effect. Consider it like a blanket around the planet which keeps it warm enough to support life. Some common greenhouse gases include:

• Carbon dioxide (CO\(_2\))
• Methane (CH\(_4\))
• Water vapor (H\(_2\)O)
• Nitrous oxide (N\(_2\)O)
• Chlorofluorocarbons (CFCs)

The presence of these gases is natural and essential, but human activities, such as burning fossil fuels and deforestation, have increased their concentration.To understand their impact, think about a garden greenhouse. It captures the sun's warmth and prevents heat from escaping. Similarly, greenhouse gases absorb heat and re-radiate it back to the Earth's surface. This increases the overall temperature, leading to global warming.

Carbon Dioxide Effects

Carbon Dioxide, commonly known as CO\(_2\), is one of the most significant contributors to the greenhouse effect due to its abundance. When fossil fuels, such as coal, oil, and natural gas are burned, CO\(_2\) is released into the atmosphere. Here are some of the effects of increased atmospheric CO\(_2\):

• Global warming: As a potent greenhouse gas, CO\(_2\) traps heat in the Earth's atmosphere, leading to rising surface temperatures.
• Ocean acidification: Oceans absorb about 30% of the CO\(_2\) produced by human activities. This decreases the pH level of seawater, affecting marine life, particularly organisms with calcium carbonate shells or skeletons.
• Change in plant growth: While plants require CO\(_2\) for photosynthesis, too much CO\(_2\) can imbalance their food source, which may alter plant growth patterns and biodiversity.

Hence, controlling CO\(_2\) emissions is crucial for maintaining ecological balance and ensuring a sustainable future.

Environmental Chemistry

Environmental chemistry is the study of chemical processes that occur in nature. It focuses on understanding how chemical compounds move, change, and affect the air, water, and soil. This field also examines the impacts human activities have on these natural chemical processes.Key areas of study in environmental chemistry include:

• Pollutants and their sources: Understanding pollutants like CO\(_2\), sulfur oxides, and nitrogen oxides is important to mitigate air and water pollution.
• Chemical reactions in the atmosphere: Reactions like the formation of ozone or smog, and the breakdown of pollutants, are crucial for assessing their impact on global climatic conditions.
• Environmental impact assessments: Assessing how industrial processes and human actions affect natural ecosystems helps in developing regulations and solutions for pollution control.
• Remediation techniques: Methods to clean up pollution and restore natural environments are a vital concern in environmental chemistry.

By understanding these processes, researchers can devise strategies to reduce pollution and mitigate climate change's adverse effects. Environmental chemistry acts as a bridge to create safe and effective environmental management practices.