Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q67 (CDS-I/2026) Geography › World Physical Geography

Which one among the following statements regarding igneous rock is correct ?

Result
Your answer: —  Â·  Correct: C

Explanation

Option C is correct because igneous rocks are primarily composed of silicate minerals. Since silicon and oxygen are the two most abundant elements in the Earth's crust, they combine with other elements to form silicates like quartz, feldspar, mica, and olivine, which constitute the bulk of igneous rocks.

  • Option A is incorrect: When magma cools deep in the interior, it cools slowly, leading to the formation of coarse-grained rocks (e.g., Granite). Fine-grained rocks form from rapid cooling at or near the surface.
  • Option B is incorrect: Basalt is a classic example of an extrusive (volcanic) igneous rock, formed from lava cooling on the Earth's surface.
  • Option D is incorrect: Lithification is the process of turning loose sediments into sedimentary rocks through compaction and cementation; it is not a characteristic of igneous rock formation.
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.
20%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

NDA-I · 2014 · Q61 Relevance score: 2.08

Statement I: Minerals are formed by slow cooling of the magma. Statement II: Very small crystals are formed when lava cools quickly on the surface.

IAS · 2001 · Q55 Relevance score: 1.90

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 · 2024 · Q115 Relevance score: 1.07

Which of the following statements regarding Earth's internal structure is/are correct ? 1. The oceanic crust is heavier than the continental crust. 2. Most of the Earth's internal heat is contained within the mantle. 3. Large convective cells in the crust circulate heat and drive plate-tectonic processes. Select the answer using the code given below :

NDA-I · 2008 · Q81 Relevance score: 0.02

Consider the following statements : 1. Coal is a sedimentary rock. 2. Basalt is an igneous rock. Which of the statements given above is/are correct?