Chemical Bonding and Molecular Structure

Assertion : $\mathrm{S}_2 \mathrm{O}_7^{2-}$ and $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ both exist. Reason : Both have same valence electrons.

Assertion : $\mathrm{BO}_3^{3-}$ and $\mathrm{SO}_3^{2-}$ are not isostructural. Reason : In $\mathrm{SO}_3^{2-}$, sulphur has one lone pair of electrons.

Which is least soluble in water?

Which of the following is incorrect about cyanogen gas?

Assertion : $\mathrm{LiCl}$ is predominantly a covalent compound. Reason : Electronegativity difference between $\mathrm{Li}$ and $\mathrm{Cl}$ is too small.

When $\mathrm{Ag}^{+}$reacts with excess of sodium thiosulphate then the obtained species have charge and geometry respectively

Which of the following statements about $\mathrm{CO}_3^{2-}$ ion is correct?

Among the following, the number of compounds having zero lone pair of electrons on central atom is $\mathrm{XeO}_3, \mathrm{XeO}_2 \mathrm{~F}_2, \mathrm{XeO}_4, \mathrm{XeO}_3 \mathrm{~F}_2, \mathrm{XeF}_4$

Which of the following is correct regarding bond angles? (i) $\mathrm{SO}_2 < \mathrm{H}_2 \mathrm{O}$ (ii) $\mathrm{H}_2 \mathrm{~S} < \mathrm{SO}_2$ (iii) $\mathrm{SO}_2 < \mathrm{H}_2 \mathrm{~S}$ (iv)…

Assertion : $\mathrm{Si}-\mathrm{Si}$ bonds are much stronger than $\mathrm{Si}-\mathrm{O}$ bonds. Reason : Silicon forms double bonds with itself.

Which of the following have same hybridisation but are not isostructural?

Which pair of molecules does not have identical structure?