Assertion :Lithium resembles magnesium diagonally placed in next group. Reason: The size of $L i^{+}$ and $M g^{2 +}$ are different and their electropositive character is same.

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 C Assertion is correct but Reason is incorrect
$L i$ and $M g$ have a diagonal relationship due to the similarity in their sizes and many of the properties are related to the size of an atom.

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

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