At STP \(x\) g of a metal hydrogen carbonate (MHCO$_3$) (molar mass \(84 \, {g/mol}\)) on heating gives CO$_2$, which can completely react with \(0.02 \, {moles}\) of MOH (molar mass \(40 \, {g/mol}\)) to give MHCO$_3$. The value of \(x\) is:
The number of \(\sigma\) bonds, \(\pi\)-bonds, and lone pairs of electrons present in the product Z in the given reaction sequence are respectively:

The hybridization of aluminum in the complexes X and Y respectively is:
