Physical Properties of Group 17 Elements

What are the correct orders of bond lengths ${\mathrm{d}}_{\mathrm{X}-\mathrm{X}}$ and bond dissociation enthalpies ${\mathrm{BDE}}_{\mathrm{X}-\mathrm{X}}$ for ${\mathrm{F}}_2$ and ${\mathrm{Cl}}_2$? (where $\mathrm{X}=\mathrm{F}$ or $\mathrm{Cl}$ )

Which amongst the following halogen has the highest hydration enthalpy?

_____ has the lowest value of ionisation energy among the halogens.

The ionisation enthalpy of _____ is highest among the halogens.

Iodine vapours are violet in colour because the molecules of iodine:

Among hydrogen halides, which of the following has maximum dipole moment?

Which among the following lithium halides is more covalent in nature?

In the formation of a chloride ion, from an isolated gaseous chlorine atom, $3.8 \mathrm{eV}$ energy is released, which would be equal to :

Which is correct

Volatile nature of halogen is because :

Fluorine does not show positive oxidation state due to absence of:

The halogen with highest negative electron gain enthalpy is ? 

Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the halogen acids should have highest bond dissociation enthalpy?

Bond energy of halogens follows the order-

Which is correct for increasing order of electron affinity of ${17}^{\mathrm{th}}$ group elements? 

What would be the reason that electron affinity of chlorine is higher than fluroine? 

${\mathrm{HF}}_2^{-}$  exists in solid state in liquid $\mathrm{HF}$ but not in aqueous solution because :

Write the atomic number of the element present in the third period and seventeenth group of the Periodic Table.

Iodine is a solid and sublimes at ordinary temperature. This is because of:

The bond length $\left(pm\right)$ of $F_2, H_2,C{l}_2 \mathrm{a}\mathrm{n}\mathrm{d}\mathrm{ }{I}_2$ , respectively is