GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Calcium
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Oxygen
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Iron
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Potassium
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Detailed explanation-1: -Oxygen is by far the most abundant element in the Earth’s crust, making up 46% of mass-coming up just short of half of the total. Oxygen is a highly reactive element that combines with other elements, forming oxides.
Detailed explanation-2: -Oxygen is the most abundant element present in the earth’s crust. 45%-50% of the earth’s crust is made up of oxygen in the formed of oxides, carbonates and other compounds.
Detailed explanation-3: -Nitrogen (N2) is the most abundant gas.
Detailed explanation-4: -Earth’s Crust Elements The Earth’s crust comprises about 95% igneous and metamorphic rocks, 4% shale, 0.75% sandstone, and 0.25% limestone. Oxygen, silicon, aluminum, and iron account for 88.1% of the mass of the Earth’s crust, while another 90 elements make up the remaining 11.9%.