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Earthquakes & Volcanoes MCQs for RAS

Practice 20 free earthquakes & volcanoes multiple choice questions for RAS exam. Instant answers, explanations in Hindi and English, and topic-wise targeted practice.

Master Earthquakes & Volcanoes under World Geography for RAS with our curated MCQ set. Every question is sourced from real Rajasthan exam patterns and updated regularly. Switch between Hindi and English anytime. Use this daily to strengthen weak areas before the exam.

RAS — World Geography — Earthquakes & Volcanoes

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

What is the primary reason the Richter scale is described as an 'objective' measurement?

Question 2 of 20

Consider the following statements regarding the Gutenberg Discontinuity: 1. It marks the Mantle-Core Boundary at a depth of 2,900 km. 2. It represents the transition point where the liquid outer core begins. 3. Direct P-waves are entirely blocked and absorbed at this specific boundary. Which of the statement(s) given above is/are correct?

Question 3 of 20

Large volcanic eruptions can lead to a temporary cooling of the Earth's surface, often referred to as a 'volcanic winter'. What is the primary atmospheric mechanism responsible for this phenomenon?

Question 4 of 20

Assertion (A): The Deccan Traps in India represent an area where massive amounts of fluid basaltic lava erupted through central volcanic vents. Reason (R): Flood Basalt Provinces are characterized by highly explosive eruptions that spread ash over thousands of square miles.

Question 5 of 20

Match List-I (Volcano Example) with List-II (Type based on periodicity): List-I A. Mt. Etna B. Mt. Kilimanjaro C. Mt. Fuji D. Mt. Stromboli List-II 1. Dormant Volcano 2. Active Volcano

Question 6 of 20

The specific point on the Earth's surface that lies vertically above the hypocenter and is typically the location of highest seismic intensity is termed the:

Question 7 of 20

Assertion (A): Magma generation at subduction zones does not primarily rely on a sudden drop in ambient lithostatic pressure. Reason (R): At subduction zones, descending oceanic plates introduce trapped water and sediments that act as chemical volatiles, fundamentally lowering the mantle's melting temperature.

Question 8 of 20

Assertion (A): Intrusive plutonic landforms such as batholiths and laccoliths are not immediately visible on the Earth's surface at the time of their formation. Reason (R): They form when magma cools and solidifies deep inside the Earth's crust, requiring millions of years of erosion to remove the overlying rock layers.

Question 9 of 20

Which of the following describes the precise geographic trajectory of the Mid-Continental (Alpide) seismic belt?

Question 10 of 20

When assessing the primary versus secondary impacts of a major seismic event, which of the following is an accurate categorization?

Question 11 of 20

In the process of Tsunami generation and propagation, what causes the 'shoaling' effect?

Question 12 of 20

During the phenomenon of liquefaction, why do structures like buildings and bridges sink or tilt?

Question 13 of 20

The "Ring of Fire" is predominantly populated by which specific class of volcanoes?

Question 14 of 20

The magnesium, potassium, and iron-rich soils directly derived from volcanic rocks are highly beneficial for specific types of agriculture. In regions like the Deccan Plateau, these soils are exceptionally suited for the cultivation of:

Question 15 of 20

At which type of tectonic plate boundaries are Mid-Ocean Ridge Volcanoes primarily found?

Question 16 of 20

At a microscopic structural level, what precise mechanical failure occurs in saturated, loose soil during a severe earthquake to trigger 'Liquefaction'?

Question 17 of 20

Match the seismic measurement scales in List-I with their fundamental characteristics in List-II: List-I A. Richter Scale B. Modified Mercalli Scale List-II 1. Measures the effects or damage at a specific location 2. Based on a base-10 logarithmic mathematical structure 3. Uses Roman numerals from I to XII 4. Remains an absolute value for a single earthquake regardless of the measurement location Codes:

Question 18 of 20

Consider the following statements regarding divergent tectonic boundaries: 1. They occur primarily at mid-ocean ridges. 2. The pulling apart of plates leads to the crust fracturing. 3. The resulting earthquakes are typically extremely deep-focus and massive in magnitude. Which of the statement(s) given above is/are correct?

Question 19 of 20

Consider the following statements about extrusive landforms: 1. They are formed exclusively by the cooling of highly viscous magma beneath the Earth's surface. 2. A geyser is classified as an extrusive landform. Which of the statements given above is/are correct?

Question 20 of 20

Deep-focus earthquakes, originating between 300 and 700 km deep, are most strongly associated with which specific tectonic feature?

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