Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

Question

$\begin{array}{1 1} \text{(1) both form nitrides} \\ \text{(2) nitrates of both Li and Mg yield NO2 and O2 on heating} \\ \text{ (3) both form basic carbonates} \\ \text{(4) both form soluble bicarbonates} \end{array}$