Assertion :Metals like Na, K, Ca and Mg are never found in their free state in nature. Reason: Metals are very reactive elements. So, it combine with other non metal to complete its octet. Metals like Na, K, Ca and Mg are never found in their free state in nature.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Metals like Na, K, Ca and Mg are never found in their free state in nature because metals are very reactive elements. So, it combine with other non metal to complete its octet, so these are found in impure form.
Thus, answer is correct.

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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