Explain why fluorine forms only one oxoacid. HOF.
 

Arrange the following in the order of: $\left(\mathrm{i}\right)$ Acidic strength $\left(\mathrm{ii}\right)$ Reducing behaviour

$(\mathrm{HI},\mathrm{HBr},\mathrm{HCI} \& \mathrm{HF})$

Explain the following with proper reason:

Anhydrous $\mathrm{HCl}$ is a bad conductor of electricity while aqueous $\mathrm{HCl}$ is a good conductor.

Explain the following with proper reason:

$\mathrm{HF}$is not stored in glass bottles but kept in wax-lined bottles.

Explain the following with proper reason:

$\mathrm{HF}$has a greater electronegativity difference and more ionic character than $\mathrm{HCl}$, $\mathrm{HBr}$and $\mathrm{HI}$but it is the weakest acid.