The bleaching action of chlorine is due to $....................$.

Silver nitrate is supplied in coloured bottles because it is

$1$. $KClO_3 \xrightarrow{\Delta }$
$2$. $XeF_2 \xrightarrow{H_2O}$
$3$. $XeF_4 \xrightarrow{H_2O}$
$4$. $PbO_2 \xrightarrow{\Delta }$
$5$. $XeF_6 \xrightarrow{H_2O}$
In how many of the above processes,$O_2$ will be one of the products?

To purify fluorine gas,fumes of $HF$ are removed by

Name two poisonous gases which can be prepared from chlorine gas.

Atom $X$ belongs to group $17$ $(VIIA)$ and is not present in the second period. Choose the incorrect statement regarding $X$ $:-$