Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

Which of the following reagents does not oxidize $HCl$?

$Cl_{2(g)} + Ba(OH)_2 \to X (aq.) + BaCl_2 + H_2O$
$X + H_2SO_4 \to Y + BaSO_4$
$Y \xrightarrow[\Delta > 365 \ K]{\Delta } Z + H_2O + O_2$
$Y$ and $Z$ are respectively

Which two of the following salts are used for preparing iodized salt?
$(i) \, KIO_3$ $(ii) \, KI$
$(iii) \, I_2$ $(iv) \, HI$

What is the product formed when $Au$ reacts with aqua regia?

When $SbF_5$ reacts with $XeF_4$ to form an adduct,the shapes of cation and anion in the adduct respectively are