$HI$ cannot be prepared by the action of conc. $H_2SO_4$ on $KI$ because:

$A$ greenish-yellow gas reacts with an alkali metal hydroxide to form a halide that is used in the manufacture of safety matches and fireworks. Identify the gas and the halide,respectively.

When fluoride is heated with conc. $H_2SO_4$ and $MnO_2$,the gas evolved is:

Which one of the following reacts with glass?

Which of the following halogens is solid at room temperature?

The correct statement$(s)$ about the oxoacids,$HClO_4$ and $HClO$,is(are):
$[A]$ $HClO_4$ is more acidic than $HClO$ because of the resonance stabilization of its anion.
$[B]$ $HClO_4$ is formed in the reaction between $Cl_2$ and $H_2O$.
$[C]$ The central atom in both $HClO_4$ and $HClO$ is $sp^3$ hybridized.
$[D]$ The conjugate base of $HClO_4$ is a weaker base than $H_2O$.