Question map
Not attempted
Correct
Incorrect
★
Bookmarked
Loading…
Q104
(IAS/1997)
Geography › World Physical Geography › Earth interior structure
Answer Verified
Which one of the following is present in the largest amount in terms of per cent by mass in the earth’s crust ?
Result
Your answer:
—
·
Correct:
B
Explanation
Oxygen is the most abundant element in the Earth’s crust by mass. Standard crustal composition data show oxygen constitutes roughly 46.6% of the crust while silicon is the second most abundant at about 27.7%; calcium accounts for only about 3.6% [1]. Carbon is present in only trace amounts in the crust (approximately 0.02% in mineral forms such as carbonates, coal, and petroleum) and is therefore negligible compared with oxygen, silicon, and calcium [2]. Given these percentages, oxygen clearly occurs in the largest proportion by mass in the Earth’s crust, making option 2 the correct choice.
Sources
- [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 4: Earths Interior > The Crust > p. 53
- [2] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > p. 58
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.
58%
got it right
✓ Thank you! We'll review this.