The elements with atomic numbers $9, 17, 35, 53, 85$ are all

Identify the products obtained when chlorine reacts with hot and concentrated $NaOH$.

$Br_2 + NaOH \xrightarrow{R.T.} Y + Z$
If $Y$ gives a precipitate with $AgNO_3$,then $Z$ does not undergo a reaction with:

Aqua-regia reacts with $Pt$ to yield

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

Chlorine is allowed to react with an excess of ammonia. In this reaction, $1$ mole of chlorine can oxidize '$Z$' moles of $NH_3$. The value of '$Z$' is: