Identify the weakest halogen acid from the following.

Which of the following properties of halogens increase with increasing atomic number?
$(I)$ Ionization energy $(II)$ Ionic radius
$(III)$ Bond energy of the $X_2$ molecule $(IV)$ Enthalpy of vaporisation

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

Select the wrong chemical reaction among the following:

Which of the following is used as an antiseptic?

Glass reacts with $HF$ to produce