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Test: Ocean Depletion - UPSC MCQ


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10 Questions MCQ Test - Test: Ocean Depletion

Test: Ocean Depletion for UPSC 2024 is part of UPSC preparation. The Test: Ocean Depletion questions and answers have been prepared according to the UPSC exam syllabus.The Test: Ocean Depletion MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Ocean Depletion below.
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Test: Ocean Depletion - Question 1
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How many molecules of ozone can one chlorine atom destroy?

Detailed Solution for Test: Ocean Depletion - Question 1

Ozone Depletion. When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules. One chlorine atom can destroy over 100,000 ozone molecules before it is removed from the stratosphere.

Test: Ocean Depletion - Question 2
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What is the primary cause of ozone layer depletion?

Detailed Solution for Test: Ocean Depletion - Question 2
Ozone layer depletion is primarily caused by the release of chlorine and bromine atoms into the atmosphere, as mentioned in the text. These atoms react with ozone and destroy ozone molecules.
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Test: Ocean Depletion - Question 3
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Which layer of the atmosphere contains "good" ozone that protects life on Earth by absorbing harmful UV rays?

Detailed Solution for Test: Ocean Depletion - Question 3
The "good" ozone that protects life on Earth by absorbing harmful UV rays is found in the stratosphere, as mentioned in the text.
Test: Ocean Depletion - Question 4
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What is the chemical symbol for ozone?
Detailed Solution for Test: Ocean Depletion - Question 4

The chemical symbol for ozone is O3, as mentioned in the text. Ozone consists of three atoms of oxygen bound together in a non-linear fashion.

Test: Ocean Depletion - Question 5
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Why is ozone in the troposphere considered "bad"?
Detailed Solution for Test: Ocean Depletion - Question 5
Ozone in the troposphere is considered "bad" because it contributes to smog formation, as mentioned in the text. It is not good to breathe and can dirty the air.
Test: Ocean Depletion - Question 6
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What is the significance of the ozone layer in the atmosphere?
Detailed Solution for Test: Ocean Depletion - Question 6
The ozone layer in the atmosphere acts as a sunscreen for the Earth by efficiently absorbing harmful ultraviolet (UV) rays from the sun, as mentioned in the text.
Test: Ocean Depletion - Question 7
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Which substance, when released into the atmosphere, is a major source of chlorine atoms that contribute to ozone depletion?
Detailed Solution for Test: Ocean Depletion - Question 7
Chlorofluorocarbons (CFCs) are a major source of chlorine atoms that contribute to ozone depletion, as mentioned in the text. When CFCs break down, they release chlorine into the atmosphere.
Test: Ocean Depletion - Question 8
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What is the primary factor that enables the formation of polar stratospheric clouds (PSCs) in the Antarctic?
Detailed Solution for Test: Ocean Depletion - Question 8
Extremely cold temperatures in the Antarctic stratosphere enable the formation of polar stratospheric clouds (PSCs), as mentioned in the text. These clouds play a role in ozone depletion.
Test: Ocean Depletion - Question 9
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Which type of radiation, among the following, is the most energetic component of sunlight reaching the Earth's surface and has profound effects on human health?
Detailed Solution for Test: Ocean Depletion - Question 9
Ultraviolet-B radiation (UV-B) is the most energetic component of sunlight reaching the Earth's surface and has profound effects on human health, as mentioned in the text. It can impact skin health and increase the risk of skin cancer.
Test: Ocean Depletion - Question 10
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What is the unit used to measure total ozone abundance in the atmosphere?
Detailed Solution for Test: Ocean Depletion - Question 10
The unit used to measure total ozone abundance in the atmosphere is the Dobson unit, named after Gordon Dobson, as mentioned in the text. It represents the thickness of the ozone column.
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