When a few drops of concentrated $HCl$ are added to bleaching powder,which of the following is produced?

What is the correct order of bond dissociation energy for the given halogens?

Which of the following are not in accordance with the property mentioned against them?
$I$. $F_2 > Cl_2 > Br_2 > I_2$ : Oxidising power
$II$. $MI > MBr > MCl > MF$ : Ionic character of metal halide
$III$. $F_2 > Cl_2 > Br_2 > I_2$ : Bond dissociation enthalpy
$IV$. $HI < HBr < HCl < HF$ : Hydrogen-halogen bond strength

Among the following,the correct order of acidity is

When treated with conc. $HCl$,$MnO_2$ yields a gas $(X)$ which further reacts with $Ca(OH)_2$ to generate a white solid $(Y)$. The solid $Y$ reacts with dil. $HCl$ to produce the same gas $X$. The solid $Y$ is

Which of the following compounds is $NOT$ in the solid state at $25^{\circ} C$?