Which of the following is formed when potassium iodide is heated with concentrated $H_2SO_4$?

Find out which of the following statements are true or false:
$(a)$ Number of $S-S$ bonds in $H_2S_nO_6$ is $(n-1)$.
$(b)$ When $F_2$ reacts with $H_2O$,it forms $HF$,$O_2$,and $O_3$.
$(c)$ $XeF_6$ on hydrolysis shows a disproportionation reaction.
$(d)$ $Al$ metal on reacting with dilute $NaOH$ gives a white precipitate of $Al(OH)_3$ as a final product.

$HBr$ and $HI$ can reduce sulfuric acid; $HCl$ can reduce $KMnO_4$. Which of the following can $HF$ reduce?

Among the following acids,the weakest one is

Iodine exists in which form in iodised salt?

The correct increasing order of oxidizing power is: