Solved UPSC CDS/OTA Question
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Q · Internal Structure of The Earthmedium · 45s
What element mostly composes the Earth's crust?
TopicInternal Structure of The Earth
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
← Previous questionQ 60 / 60
Step-by-Step Solution
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The crust is primarily composed of silicate minerals rich in silicon and oxygen, making up most of the rocky Earth's outer shell.
Final Answer: Option B - Silicon and oxygen (silicate minerals)