In which of the following molecules/ions BF₃, ${\mathrm{NO}}_2^{-}$,  ${\mathrm{NH}}_2^{-,\hspace{0.17em}}$and H₂O, the central atom is sp² hybridized?

1. $N{O}_2^{-}$ $and$ $N{H}_2^{-}$

2. $N{H}_2^{-}$ $and$ $H_{2}O$

3. $N{O}_2^{-}$ $and$ $H_{2}O$

4. $B{F}_3$ $and$ $N{O}_2^{-}$

What is the dominant intermolecular force or bond that must be overcome in converting liquid CH₃OH to a gas?

1. Hydrogen bonding

2. Dipole-dipole interaction

3. Covalent bonds

4. London dispersion force

Identify the correct increasing order of bond order among the following species:

Find the correct increasing order of C–O bond length among CO, CO₃²⁻ , and CO₂:

Select the pair of isostructural species.

In which of the following molecules are all the bonds not equal?

Which of the following species has a linear shape?

1. $N{O}_2^{-}$

2. $S{O}_2$

3. $N{O}_2^{+}$

4. $O_3$

Which of the following is the most basic oxide?

1. $A{l}_2{O}_3$

2. $S{b}_2{O}_3$

3. $B{i}_2{O}_3$

4. $Se{O}_2$

Which of the following is not a correct statement?