Which of the following elements exhibits the most basic character?

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

Which of the following is a correct statement?

The property of halogens which is not correctly matched is

Of the four oxyacids of chlorine,the strongest oxidising agent in dilute aqueous solution is:

Assertion : $SF_6$ cannot be hydrolysed but $SF_4$ can be.
Reason : $Six$ $F$ atoms in $SF_6$ prevent the attack of $H_2O$ on sulphur atom of $SF_6$.