In the preparation of sulphuric acid,$V_2O_5$ is used in the reaction which is:

$H_2S$ is more acidic than $H_2O$,due to

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$ : Both rhombic and monoclinic sulphur exist as $S_8$ while oxygen exists as $O_2$.
Reason $(R)$ : Oxygen forms $p \pi-p \pi$ multiple bonds with itself and other elements having small size and high electronegativity like $C, N$,which is not possible for sulphur.
In the light of the above statements,choose the most appropriate answer from the options given below:

What is formed when sulfur dioxide reacts with bromine water?

Which element from the following does $NOT$ belong to the chalcogen family?

Which of the following is the structure of oleum?