In this video, we explore some of the most important locations that have been in the news recently and hold significance for UPSC and other competitive exams. From environmental hotspots to strategic regions, learn why these places matter and stay ahead in your current affairs preparation! ๐๐
Topic: Carlsberg Ridge โ UPSC & State PCS PYQs / UPSC-standard MCQs
1. [UPSC Prelims 2018]
Which one of the following is an important characteristic of the Carlsberg Ridge?
A. It is an active subduction zone located in the Pacific Ocean.
B. It is an aseismic ridge located in the Atlantic Ocean.
C. It is a spreading site located in the Indian Ocean.
D. It is a transform fault zone located near Japan.
โ Answer: C
๐ Explanation: The Carlsberg Ridge is a divergent tectonic boundary (a mid-oceanic ridge) in the north-central Indian Ocean, between the African and Indo-Australian Plates. It is an active spreading center.
2. [UPSC Standard Practice โ based on PYQ pattern]
Carlsberg Ridge forms a part of which of the following larger tectonic systems?
A. Mid-Atlantic Ridge
B. East Pacific Rise
C. Indian Ocean Ridge System
D. Mariana Trench System
โ Answer: C
๐ Explanation: Carlsberg Ridge is a northern section of the Indian Ocean Ridge System. It connects with the Central Indian Ridge and runs roughly northโsouth.
3. [State PCS โ UPPCS Pattern]
The Carlsberg Ridge is located between which of the following plates?
A. Indian Plate and Eurasian Plate
B. African Plate and Indo-Australian Plate
C. Pacific Plate and Eurasian Plate
D. Nazca Plate and Pacific Plate
โ Answer: B
๐ Explanation: The ridge marks the boundary between the African Plate (Somali Plate) and Indo-Australian Plate. It is associated with seafloor spreading.
4. [UPSC Practice Question]
Which of the following statements about Carlsberg Ridge is/are correct?
It is a part of the mid-ocean ridge system.
It is associated with seafloor spreading and volcanic activity.
It passes through the Pacific Ocean.
Select the correct answer:
A. 1 only
B. 1 and 2 only
C. 2 and 3 only
D. 1, 2 and 3
โ Answer: B
๐ Explanation: Statements 1 and 2 are correct. Statement 3 is incorrect because the Carlsberg Ridge lies in the Indian Ocean, not the Pacific.
5. [BPSC / UPSC Level Practice]
Which of the following best explains the geological significance of the Carlsberg Ridge?
A. It is a convergent boundary where two plates collide.
B. It is a divergent boundary where new oceanic crust is formed.
C. It is an intraplate hotspot region.
D. It is a transform boundary without volcanic activity.
โ Answer: B
๐ Explanation: The Carlsberg Ridge is a divergent boundary, meaning plates are moving apart, and magma upwells to create new oceanic crust.
๐ Quick Revision Notes on Carlsberg Ridge
๐ Location: Northern part of the Indian Ocean โ between the Somali Plate (African Plate) and Indo-Australian Plate.
๐ Type of Plate Boundary: Divergent โ Mid-Ocean Ridge
๐ Features: High seismicity, volcanic activity, hydrothermal vents, and seafloor spreading.
๐งญ Connection: Joins Central Indian Ridge to the Gulf of Aden.
๐ฐ๏ธ Importance: Studied in plate tectonics and marine geology for understanding ocean floor spreading and continental drift.
The link to join the course :ย Online Courses
Topic: Barren Island โ UPSC & State PCS MCQs with Answers
1. [UPSC Prelims 2017]
Which of the following statements about Barren Island is/are correct?
Barren Island is the only active volcano in India.
It is located in the Andaman Sea.
It is part of a chain of volcanoes extending from Sumatra to Myanmar.
Select the correct answer using the code below:
A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3
โ Answer: D
๐ Explanation:
Barren Island is indeed Indiaโs only active volcano.
It lies in the Andaman Sea, about 135 km northeast of Port Blair.
It is part of the volcanic arc between Sumatra and Myanmar associated with the subduction of the Indian Plate beneath the Burmese Plate.
2. [UPSC Prelims 2018]
Barren Island is located in which of the following seas?
A. Arabian Sea
B. Bay of Bengal
C. Andaman Sea
D. South China Sea
โ Answer: C
๐ Explanation: Barren Island is situated in the Andaman Sea, east of the Andaman Islands, within Indian territory.
3. [State PCS โ BPSC Pattern]
Which one of the following is the only active volcano in India?
A. Narcondam Island
B. Deccan Traps
C. Barren Island
D. Lakshadweep Islands
โ Answer: C
๐ Explanation: Narcondam is a dormant volcano. Deccan Traps are volcanic plateaus (now inactive). Barren Island is the only active volcano in India.
4. [UPPCS 2020 โ Adapted]
Where exactly is Barren Island located?
A. Off the coast of Tamil Nadu
B. Off the coast of Gujarat
C. East of the Andaman Islands
D. Near Nicobar Islands
โ Answer: C
๐ Explanation: It lies about 135 km northeast of Port Blair in the Andaman Sea, east of the main Andaman Islands.
5. [UPSC Standard Practice]
Consider the following statements regarding Barren Island Volcano:
It is a stratovolcano.
It has erupted multiple times in the 21st century.
It is located on a divergent plate boundary.
Which of the above statements is/are correct?
A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3
โ Answer: A
๐ Explanation:
Statement 1: โ Correct. Barren Island is a stratovolcano (composite volcano).
Statement 2: โ Correct. It erupted in 1991, 2005, 2017, and again in 2021.
Statement 3: โ Incorrect. It is associated with a convergent plate boundary (Indian Plate subducting beneath Burmese Plate).
๐ Quick Revision Notes on Barren Island Volcano
๐ Location: Andaman Sea, ~135 km NE of Port Blair.
๐ Type: Stratovolcano; only active volcano in India and South Asia.
๐ Geological Setting: Convergent boundary (subduction of Indian Plate beneath Burmese Plate).
๐๏ธ Status: Uninhabited island; protected area; occasional eruptions.
๐ฐ๏ธ Last major eruptions: 1991 (major), 2005 (minor), 2017, and 2021 (volcanic activity observed by Indian Coast Guard & NASA satellites).
Topic: Gulf of Mannar โ UPSC & State PCS MCQs with Answers
1. [UPSC Prelims 2011]
Gulf of Mannar is situated along the coast of:
A. Kerala
B. Karnataka
C. Tamil Nadu
D. Andhra Pradesh
โ Answer: C
๐ Explanation: Gulf of Mannar lies between the southeastern coast of Tamil Nadu and the western coast of Sri Lanka, separated by the Palk Strait and Adamโs Bridge.
2. [UPSC Prelims 2014]
The Gulf of Mannar is considered a rich marine biodiversity hotspot because:
It is home to coral reefs and seagrass beds.
It has a high diversity of mangroves.
It is an important breeding ground for marine species.
Which of the statements given above is/are correct?
A. 1 and 2 only
B. 2 only
C. 1 and 3 only
D. 1, 2 and 3
โ Answer: D
๐ Explanation: The Gulf of Mannar Biosphere Reserve is Indiaโs first marine biosphere reserve, hosting coral reefs, mangroves, seagrass ecosystems, and over 3,600 species of plants and animals.
3. [State PCS โ TNPSC / BPSC Pattern]
Which of the following statements about Gulf of Mannar is correct?
A. It separates India from Myanmar.
B. It separates Tamil Nadu from Sri Lanka.
C. It lies between Gujarat and Pakistan.
D. It connects the Arabian Sea and Red Sea.
โ Answer: B
๐ Explanation: Gulf of Mannar separates the southeastern coast of India (Tamil Nadu) from the northwestern coast of Sri Lanka.
4. [UPSC Prelims 2018 โ Biodiversity context]
Which one of the following is the first Marine Biosphere Reserve in India?
A. Gulf of Kachchh
B. Gulf of Mannar
C. Lakshadweep
D. Sundarbans
โ Answer: B
๐ Explanation: Declared in 1989, the Gulf of Mannar Biosphere Reserve is Indiaโs first Marine Biosphere Reserve. It covers about 10,500 sq km.
5. [UPSC Standard Practice โ Assertion-Reason Type]
Assertion (A): Gulf of Mannar has been declared a Biosphere Reserve.
Reason (R): It contains rich coral reefs, sea grass, and diverse marine fauna.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
โ Answer: A
๐ Explanation: Gulf of Mannar was declared a Biosphere Reserve precisely because of its unique and rich marine biodiversity, including endangered species like dugongs.
6. [State PCS โ UPPCS Pattern]
Which of the following straits or channels is associated with the Gulf of Mannar?
A. Palk Strait
B. Sunda Strait
C. Torres Strait
D. Bering Strait
โ Answer: A
๐ Explanation: The Palk Strait separates Tamil Nadu from Sri Lanka and connects the Bay of Bengal with the Gulf of Mannar.
7. [UPSC Practice โ Geography]
Consider the following statements about the Gulf of Mannar Biosphere Reserve:
It covers parts of the Tamil Nadu coast.
It is home to Dugongs (sea cows), an endangered species.
It includes a chain of 21 islands.
Which of the statements given above is/are correct?
A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3
โ Answer: D
๐ Explanation:
Covers 10 coastal districts of Tamil Nadu.
Dugongs are a flagship species of the region.
The Gulf of Mannar Marine National Park includes 21 small islands.
๐ Quick Revision Notes โ Gulf of Mannar
๐ Location: Between southeastern Tamil Nadu and northwestern Sri Lanka.
๐ Adjacent Features: Bay of Bengal (east), Palk Strait (north), Adamโs Bridge (Rama Setu).
๐ชธ Biodiversity: Coral reefs, seagrass, mangroves, >3600 marine species.
๐ Flagship Species: Dugong (sea cow).
๐๏ธ Protected Area: First Marine Biosphere Reserve of India (1989), includes 21 islands.
๐งญ Strategic Importance: Lies on international shipping route; sensitive ecosystem.
Best Online Coaching for Civil Service_IAS_ UPSC_IFS_IPS
Free Study Materialย ย ENSEMBLE IAS ACADEMY | Call +91 98115 06926
Visit us:-ย https://ensembleias.com/ย |
Online Store:ย https://online.ensemble.net.in/
#currentaffairs , #important_locations , #upscpreparation , #geography , #newsupdate, #geographyforupsc , #civilservicespreparation , #upscgeography , #iasgeography , #geographyoptional , #upscmains , #upsc , #geographyinsights , #upscjourney , #geographymatters ,
