Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q69 (CDS-I/2026) Geography › World Physical Geography

Consider the following statements regarding Volcanic Cones : 1. During volcanic eruptions, acid lava cones are formed by highly viscous lavas. 2. Viscous lavas have high mobility and can travel for long distances. 3. Acid lavas result in the formation of high cones with steep slopes. 4. Composite cones are the highest volcanic cones. Which of the statements given above are correct ?

Result
Your answer: —  Â·  Correct: C

Explanation

Statement 1 and 3 are correct: Acid lavas are highly viscous because they have a high silica content. Due to this high viscosity, they do not flow far from the vent, cooling quickly and solidifying to form steep-sided, high volcanic cones.

Statement 2 is incorrect: Viscosity refers to a fluid's resistance to flow. Therefore, highly viscous lavas have low mobility and cannot travel long distances. In contrast, basic (basaltic) lavas have low viscosity, high mobility, and form flat shield volcanoes.

Statement 4 is correct: Composite cones (stratovolcanoes) are built from alternating layers of lava and pyroclastic materials (ash, cinder). They are characterized by their large size, symmetrical shapes, and are generally the highest and most prominent volcanic peaks on Earth, such as Mt. Fuji and Mt. Mayon.

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
69%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

IAS · 1999 · Q127 Relevance score: 3.45

Consider the following statements : Glass can be etched or scratched by I. diamond. II. hydrofluoric acid. III. aquaregia. IV. cone, sulphuric acid. Which of these statements are correct ?

IAS · 2001 · Q55 Relevance score: 3.22

Consider the following statements : I. Most magmas are a combination of liquid, solid and gas. II. Water vapour and carbon dioxide are the principal gases dissolved in a magma. III. Basaltic magma is hotter than the silicic magma. IV. The magma solidified between sedimentary rocks in a horizontal position is known as dike. Which of these statements are correct ?

NDA-I · 2022 · Q88 Relevance score: 3.01

Consider the following statements : 1. Rocks do not remain in their original form for long and undergo transformation. 2. Transformation of rocks is caused by weathering, erosion and metamorphic action. Which of the statements given above is/are correct?

CAPF · 2023 · Q45 Relevance score: 2.84

Consider the following statements: 1. Many of the world’s largest mountain chains exist beneath the sea. 2. Some mountain chains are revealed as island arcs. 3. The mid-oceanic ridges form the longest mountain chains. 4. The mid-Atlantic ridge rises thirty-three metres above the floor of the Atlantic. Which of the statements given above are correct?