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Solar Ultraviolet radiation is absorbed by:

A. Ozone layer
B. Carbon dioxide
C. Water vapor
D. Methane

Show Answer…
Correct Answer: A (Ozone layer)

Explanation:

Solar ultraviolet (UV) radiation is a type of electromagnetic radiation that comes from the sun. The ozone layer, which is a layer of ozone gas in the Earth’s atmosphere, absorbs most of the sun’s UV radiation before it reaches the Earth’s surface.
The ozone layer is located in the stratosphere, between 10 and 50 kilometers above the Earth’s surface. It is formed by the interaction of UV radiation with oxygen molecules in the atmosphere. Ozone is a molecule that contains three oxygen atoms, and it absorbs UV radiation through a process called photodissociation.

When UV radiation interacts with ozone, it breaks down the ozone molecule into an oxygen molecule and a single oxygen atom. The oxygen atom can then interact with another oxygen molecule to form a new ozone molecule. This process is called the ozone-oxygen cycle, and it is responsible for maintaining the balance of ozone in the atmosphere.

If the ozone layer is depleted, more UV radiation can reach the Earth’s surface. This can have harmful effects on human health, such as increasing the risk of skin cancer and cataracts. It can also have harmful effects on ecosystems, such as damaging crops and marine life.

In conclusion, the ozone layer absorbs most of the sun’s UV radiation before it reaches the Earth’s surface. This is an important function of the Earth’s atmosphere, as UV radiation can have harmful effects on human health and ecosystems. The ozone layer is formed by the interaction of UV radiation with oxygen molecules in the atmosphere, and it is responsible for maintaining the balance of ozone in the atmosphere through the ozone-oxygen cycle.


General Knowledge MCQs: Enhance Your Knowledge with CSSMCQS


Are you looking to expand your general knowledge and improve your performance in competitive exams?

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Introduction

CSSMCQS offers a comprehensive platform for General Knowledge MCQs, catering to the needs of aspirants preparing for FPSC, NTS, KPPSC, PPSC, and other competitive exams in Pakistan. With a vast collection of MCQs across different subjects, CSSMCQS aims to provide a thorough understanding of various topics and boost your exam readiness.

MCQ Categories at CSSMCQS

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General Knowledge MCQs by CSSMCQS


General Knowledge MCQs by CSSMCQS

General Knowledge MCQs by CSSMCQS

MCQs of General Knowledge [GK MCQs]

The section GK MCQs consists of World Geography, Atmosphere, Science & Literature, events Mcqs, Current Affairs Mcqs, Pakistan Affairs Mcqs and International Organizations.
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Conclusion

General Knowledge MCQs play a vital role in preparing for competitive exams and enhancing your overall knowledge. CSSMCQS offers a comprehensive collection of MCQs covering various topics, providing you with ample resources to improve your exam performance. Visit CSSMCQS today and embark on a journey of knowledge enrichment.

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