What is the product formed when iodine reacts with concentrated nitric acid?

Which of the following molecules has the highest bond dissociation enthalpy?

The bond dissociation energies of $F_2, Cl_2, Br_2$ and $I_2$ are $155, 244, 193$ and $151 \ kJ \ mol^{-1}$ respectively. Which of these has the weakest bond?

State the electronic configurations of Group-$17$ elements.

The thermally most stable compound is:

$A$ greenish yellow gas reacts with an alkali metal hydroxide to form a halate which can be preferentially used in fire works and safety matches,the gas and halate respectively are