Which is the best description of the behaviour of bromine in the reaction given below $H_2O + Br_2 \to HOBr + HBr$?

If $Cl_2$ is passed through hot aqueous $NaOH$, the products formed have $Cl$ in different oxidation states. These are indicated as

When white phosphorus reacts with caustic soda $(NaOH)$,$PH_3$ and $NaH_2PO_2$ are formed. This reaction is an example of what?

The disproportionation of $MnO_{4}^{2-}$ in acidic medium results in the formation of two manganese compounds $A$ and $B$. If the oxidation state of $Mn$ in $B$ is smaller than that of $A$,then the spin-only magnetic moment $(\mu)$ value of $B$ in $BM$ is $.........$ (Nearest integer).

In the following reaction,assign the oxidation state for the underlined atom in the product of complete hydrolysis at $R.T.$:
$\underline{Cl}O_3 + H_2O \longrightarrow HClO_3 + HClO_4$

Fluorine reacts with ice and results in the change: $H_2O_{(s)} + F_{2(g)} \to HF_{(g)} + HOF_{(g)}$. Justify that this reaction is a redox reaction.