When chlorine water is exposed to sunlight,the colour change that occurs is:

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

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{I}F_5 + 3H_2O \longrightarrow HIO_3 + 5HF$

Which of the following can chlorine not displace?

In halogens,with the increase of atomic number,which trend is observed?

The least active halogen with hydrogen is