The following acids have been arranged in the order of decreasing acid strength. Identify the correct order.
$I$. $ClOH$
$II$. $BrOH$
$III$. $IOH$

The correct set that contains all kinds (basic, acidic, amphoteric, and neutral) of oxides is:

Among the statements $(I-IV)$,the correct ones are:
$(I)$ $Be$ has smaller atomic radius compared to $Mg$.
$(II)$ $Be$ has higher ionization enthalpy than $Al$.
$(III)$ Charge/radius ratio of $Be$ is greater than that of $Al$.
$(IV)$ Both $Be$ and $Al$ form mainly covalent compounds.

The increasing order of reactivity among group $1$ elements is $Li < Na < K < Rb < Cs$ whereas that among group $17$ elements is $F > Cl > Br > I$. Explain.

Which of the following oxides is the most amphoteric?

In the reaction $2Br^- + X_2 \to Br_2 + 2X^-$,$X_2$ is .......