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Standard XII

Chemistry

Lattice Energy

Assertion :Of...

Question

Assertion :Of the various chlorides of alkaline earth metals $B e C l_{2}$ is covalent in nature, where as $M g C l_{2}$ and $C a C l_{2}$ are ionic compounds Reason: $B e$ is the first member of group 2

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

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Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
Both assertion and reason are true but reason is not the correct explanation of assertion. The ionic nature of $M g C l_{2}$ and $C a C I_{2}$ is due to the large difference in electronegativity values of Mg, Ca to that of chlorine.
Hence, option B is correct.

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Assertion :Of the various chlorides of alkaline earth metals BeCl2 is covalent in nature, where as MgCl2 and CaCl2 are ionic compounds Reason: Be is the first member of group 2

Assertion :Of the various chlorides of alkaline earth metals $B e C l_{2}$ is covalent in nature, where as $M g C l_{2}$ and $C a C l_{2}$ are ionic compounds Reason: $B e$ is the first member of group 2