Mid-Oceanic Ridges are characterized by: 1. Two chains of mountains separated by a large depression. 2. The peaks of these ridges never reach the ocean's surface. 3. They are found in all the major oceans of the world. Which of the statements given above is/are correct?

The correct option is 1 and 3 only. Explanation Mid-Oceanic Ridges are interconnected underwater mountain systems formed by plate tectonics. They constitute the longest mountain chain on Earth, extending over 65,000 km, and serve as the zone where new ocean floor is created through volcanic activity at divergent plate boundaries. - Statement 1 is Correct: Morphologically, Mid-Oceanic Ridges are characterized by a central rift system at the crest. This consists of two parallel chains of mountains separated by a large, deep depression known as a rift valley. This valley is the site of active crustal formation. - Statement 2 is Incorrect: While the majority of the ridge system lies deep underwater, the peaks often rise above the ocean surface to form islands. Notable examples include Iceland, which is a part of the Mid-Atlantic Ridge, and the Azores. - Statement 3 is Correct: The Mid-Oceanic Ridge system is a continuous global feature found in all major ocean basins. It traverses the Atlantic Ocean (Mid-Atlantic Ridge), the Indian Ocean (Central Indian Ridge), the Pacific Ocean (East Pacific Rise), and the Southern Ocean. Key Takeaway: Mid-Oceanic Ridges are global divergent plate boundaries characterized by a central rift valley; while mostly submerged, their peaks can rise above sea level to form islands like Iceland.

NCERT Class 11 Geography — Chapter 1: Water (Oceans)

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Mid-Oceanic Ridges are characterized by:

Two chains of mountains separated by a large depression.
The peaks of these ridges never reach the ocean's surface.
They are found in all the major oceans of the world.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A2 only
B1 and 2 only
C1, 2 and 3
D1 and 3 only

Did you get this right?

Solution

The correct option is 1 and 3 only.

Explanation

Mid-Oceanic Ridges are interconnected underwater mountain systems formed by plate tectonics. They constitute the longest mountain chain on Earth, extending over 65,000 km, and serve as the zone where new ocean floor is created through volcanic activity at divergent plate boundaries.

Statement 1 is Correct: Morphologically, Mid-Oceanic Ridges are characterized by a central rift system at the crest. This consists of two parallel chains of mountains separated by a large, deep depression known as a rift valley. This valley is the site of active crustal formation.
Statement 2 is Incorrect: While the majority of the ridge system lies deep underwater, the peaks often rise above the ocean surface to form islands. Notable examples include Iceland, which is a part of the Mid-Atlantic Ridge, and the Azores.
Statement 3 is Correct: The Mid-Oceanic Ridge system is a continuous global feature found in all major ocean basins. It traverses the Atlantic Ocean (Mid-Atlantic Ridge), the Indian Ocean (Central Indian Ridge), the Pacific Ocean (East Pacific Rise), and the Southern Ocean.

Key Takeaway: Mid-Oceanic Ridges are global divergent plate boundaries characterized by a central rift valley; while mostly submerged, their peaks can rise above sea level to form islands like Iceland.

Your note

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Consider the following statements regarding the relief of the ocean floor: 1. The oceans merge so naturally into one another that it is hard to demarcate them. 2. A major portion of the ocean floor is found at depths less than 1 km. 3. The ocean floors are rugged and contain mountain ranges similar to those on continents. Which of the statements given above is/are correct?

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Which one of the following sequences correctly arranges the major divisions of the ocean floor from the coast towards the deep sea?

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The correct option is 1 and 3 only.

Explanation

Statement 1 is Correct: Morphologically, Mid-Oceanic Ridges are characterized by a central rift system at the crest. This consists of two parallel chains of mountains separated by a large, deep depression known as a rift valley. This valley is the site of active crustal formation.
Statement 2 is Incorrect: While the majority of the ridge system lies deep underwater, the peaks often rise above the ocean surface to form islands. Notable examples include Iceland, which is a part of the Mid-Atlantic Ridge, and the Azores.
Statement 3 is Correct: The Mid-Oceanic Ridge system is a continuous global feature found in all major ocean basins. It traverses the Atlantic Ocean (Mid-Atlantic Ridge), the Indian Ocean (Central Indian Ridge), the Pacific Ocean (East Pacific Rise), and the Southern Ocean.