Identify the pair of hydrides which have polymeric structure.

Thermal decomposition of which of the salt listed below yields a basic and an acidic oxide simultaneously?

Which one of the alkaline earth metals shows some anomalous behaviour and has the same electronegativity as aluminium?

Which of the following alkaline earth metals forms complex salts?

Which of the following compounds is used for the preparation of quicklime?

What are $X$,$Y$ and $Z$ in the following reactions?
$CaCO_3 \stackrel{\Delta}{\rightleftharpoons} CO_2 + X$
$X + H_2O \longrightarrow Y$
$Y + Cl_2 \longrightarrow Z$