Assertion :On reacting $M g$ with $C l_{2}$ , $M g C l_{2}$ is formed and not $M g C l$ . Reason: $M g^{2 +}$ ion has stable octet configuration and not $M g^{+}$ .

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
The oppositely charged of the magnesium and chloride ions attract each other and ionic bonds are formed.
$M g + {C l}_{2} \to M g {C l}_{2}$
Electronic configuration of $M g$ : $[N e] 3 s^{2}$
Thus stable octate of $M g$ will form when $M g$ loses two electrons from its outer orbit.

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