GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sodium and Nitrogen
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Oxygen and Aluminum
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Iron and Carbon
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Oxygen and Hydrogen
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Detailed explanation-1: -Since the oceans are mostly water, the elements hydrogen and oxygen are the most common. Sodium and chlorine are found in the salt in ocean water.
Detailed explanation-2: -The six most abundant ions of seawater are chloride (Cl−), sodium (Na+), sulfate (SO24−), magnesium (Mg2+), calcium (Ca2+), and potassium (K+). By weight these ions make up about 99 percent of all sea salts.
Detailed explanation-3: -The earth is full of a wide variety of rocks and minerals which provides the soil to grow vegetation and support life. The two most common elements in the earth’s crust are oxygen (46%) and silicon (28%). Because of this, the most abundant mineral in the earth’s crust is silica (silicon dioxide).
Detailed explanation-4: -Chlorine is the most abundant element in seawater. Cl (Atomic no. Chlorine is a yellow-green gas at room temperature. The seawater contains 18.98 parts per thousand of Chlorine, 10.56 parts per thousand of Sodium, and 1.27 parts per thousand of Magnesium. More items