जॉइन Examsbookउत्तर : 3. "Magnesium"
Metal extracted from seawater5
प्र: Metal extracted from seawater
- 1Potassiumfalse
- 2Calciumfalse
- 3Magnesiumtrue
- 4Sodiumfalse
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उत्तर : 3. "Magnesium"
व्याख्या :
Answer: C) Magnesium Explanation: Magnesium is dissolved in seawater at a concentration of about 1,000 parts per million and is the only metal directly extracted from seawater.

