When $KBr$ is treated with conc. $H_2SO_4$,a reddish-brown gas is evolved. The evolved gas is:

Which of the following properties does not correspond to the order $HI < HBr < HCl < HF$?

When $1 \ mol$ of fluorine reacts with $2 \ mol$ of hot and concentrated $KOH$,the products obtained are $KF$,$H_2O$,and $O_2$. The molar ratio of $KF$,$H_2O$,and $O_2$ produced is respectively:

Match the interhalogen compounds of Column-$I$ with the geometry in Column-$II$ and assign the correct code.

Column $I$	Column $II$
$A$. $XX'$	$i$. $T$-shape
$B$. $XX'_3$	$ii$. Pentagonal bipyramidal
$C$. $XX'_5$	$iii$. Linear
$D$. $XX'_7$	$iv$. Square pyramidal
	$v$. Tetrahedral

Anhydrous ferric chloride is prepared by

Which of the following reacts most slowly with nitric acid?