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World Geography - 1 (Gen. Studies)
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Which of the following options represents the correct decreasing order of the rock-forming elements in terms of their availability in the earth’s crust?
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A
Oxygen > Silicon > Aluminium > Iron
💡 Explanation:
Availability of various rock forming elements (in percent) in earth’s crust (in % mass) is
Oxygen – 46.6
Silicon – 27.7
Aluminium – 8.1
Iron – 5.0