Among the following,the correct order of acidity is

$MnO_{2} + HCl \xrightarrow{\Delta} A_{(g)}$
$A_{(g)} + F_{2} (\text{excess}) \rightarrow B_{(g)}$
$B_{(l)} + U_{(s)} \rightarrow C_{(g)} + D_{(g)}$
The gases $A$,$B$,$C$ and $D$ are respectively

On boiling an aqueous solution of $KClO_3$ with iodine,the following product is obtained:

Which of the following oxoacids of chlorine is the least oxidizing in nature?

Which of the following halide ions can be oxidized by nitric acid?

What are the products formed when moist chlorine gas is reacted with hypo $(Na_2S_2O_3)$?