Which of the following halogens is the most basic element?

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{I}OF_5 + 2H_2O \longrightarrow HIO_4 + 5HF$

Which among the following molecules has the lowest bond dissociation enthalpy?

Combination of which parameters explains the higher oxidizing strength of $F_2$ as compared to $Cl_2$ in water?

Which of the following halides is inert towards hydrolysis at room temperature?

The element which can displace three other halogens from their compound is