Q.
Which is not the correct variation of the property indicated of chlorides of alkaline earth metals?
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a
BeCl2
b
BeCl2
c
BaCl2
d
BaCl2
answer is A.
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Detailed Solution
By Fajan's rule, smaller the cation, larger the anion, larger the charge, presence of d- and f-electrons, then larger the polarisation of the cation by anion and vice-versa. Thus, covalent nature increases, melting point decreases, lattice energy increases and thermal stability increases Size Be2+
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