Which of the following is a pseudohalogen analogue of an interhalogen?

Which of the following oxoacids of chlorine is the least oxidizing in nature?

When $1 \ mol$ of fluorine reacts with $2 \ mol$ of hot and concentrated $KOH$,the products formed are $KF$,$H_2O$,and $O_2$. What is the molar ratio of $KF$,$H_2O$,and $O_2$ produced?

Hydrofluoric acid $(HF)$ cannot be stored in glass bottles because it reacts with glass to form which of the following?

The products obtained when chlorine gas reacts with cold and dilute aqueous $NaOH$ are:

$X_2$ reacts with water to form $HX_{(aq)}$ and $HOX_{(aq)}$. $Y_2$ reacts with water to form $O_{2(g)}$,$Y^{-}_{(aq)}$ and $H^{+}_{(aq)}$. $Z_2$ does not react with water. $X_2, Y_2, Z_2$ are respectively