Embibe Experts Solutions for Chapter: Chemical Bonding, Exercise 2: KVPY PROBLEMS (PREVIOUS YEARS)

The most stable Lewis acid-base adduct among the following is:

The hybridisation of the central atom and the shape of ${\left[{\mathrm{IO}}_2{\mathrm{F}}_5\right]}^{2-}$ ion, respectively, are:

Among ${\mathrm{P}}_2{\mathrm{O}}_5, {\mathrm{As}}_2{\mathrm{O}}_3, {\mathrm{Sb}}_2{\mathrm{O}}_3$ and ${\mathrm{Bi}}_2{\mathrm{O}}_3$, the most acidic oxide is:

Among $\mathrm{K}, \mathrm{Mg}, \mathrm{Au}$ and $\mathrm{Cu}$, the one which is extracted by heating its ore in air is:

The thermal stability of alkaline earth metal carbonates $-{\mathrm{MgCO}}_3, {\mathrm{CaCO}}_3, {\mathrm{SrCO}}_3$ and ${\mathrm{BaCO}}_3$, follows the order:

The molecule which is NOT hydrolysed by water at $25 °\mathrm{C}$ is:

For a $4\mathrm{p}$ orbital, the number of radial and angular nodes, respectively, are:

The $\mathrm{F}-\mathrm{B}-\mathrm{F}$ bond angels in ${\mathrm{BrF}}_5$ and $\mathrm{Cl}-\mathrm{P}-\mathrm{Cl}$ bond angles in ${\mathrm{PCl}}_5$, respectively, are