Atomic and Physical Properties of Group 17 Elements

_____ 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 ? 

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 :

Which of the following is correct statement?

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

Which option among the following is not correct as per indicated property?

The elements with atomic numbers 9, 17, 35, 53 and 85 belong to

An element M has an atomic number 9 and atomic mass 17, its ion will be represented by

The elements of which of the following groups will form anions most readily?