Which of the following is a diamagnetic species?

1. ${\mathrm{O}}_2$

2. ${\mathrm{O}}_2^{2-}$

3. ${\mathrm{O}}_2^{+}$

4. ${\mathrm{O}}_2^{-}$

The geometry and the dipole moment of ${\mathrm{H}}_2\mathrm{S}$ is:

 A bent T-shape molecule among the following is:

1. \(\mathrm{ICl}^-_4\)
2. \(\mathrm{PCl}_3\)
3. \(\mathrm{BrF}_3\)
4. \(\mathrm{I}^-_3\)

Which of the following species deviates from the octet rule?

1. $C{O}_3^{2-}$

2. $H_{2}S{O}_3$

3. $PC{l}_3$

4. $O_3$

Which of the following atomic orbitals would have the greatest overlap to form the strongest covalent bond?

 The 'S' atom among the following that does not have \(\mathrm{sp}^3\) hybridization is

Which of the following pairs of species have similar shapes?

A pair in which both species are not likely to exist is:

A molecule that has an unequal bond length is : 

Amongst ${\mathrm{H}}_2\mathrm{O}, {\mathrm{H}}_2\mathrm{S}, {\mathrm{H}}_2\mathrm{Se} \mathrm{and} {\mathrm{H}}_2\mathrm{Te}$ the one with the highest boiling point is:

1. H₂O because of H-bonding.

2. H₂Te because of higher molecular weight.

3. H₂S because of H-bonding.

4. H₂Se because of lower molecular weight.