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Q)

# Which of the following is the correct order of lattice energy

$\begin{array}{1 1}(a)\;BeCO_3 > CaCO_3 > MgCO_3 \\(b)\;BeCO_3 > MgCO_3 > CaCO_3\\(c)\;CaCO_3 > MgCO_3 > BeCO_3\\(d)\;CaCO_3 > BeCO_3 > MgCO_3\end{array}$

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A)
$BeCO_3 > MgCO_3 > CaCO_3$
Hence (b) is the correct answer.