What is the structure of the dithionate ion?

Which of the following hydrides of Group $16$ elements has the highest reducing property?

Below are two statements. One is labeled as Assertion $(A)$ and the other as Reason $(R):$
Assertion $(A):$ $H_2Te$ is more acidic than $H_2S$.
Reason $(R):$ The bond dissociation enthalpy of $H_2Te$ is less than that of $H_2S$.
In the context of the above statements,choose the correct answer from the following options:

What do we get upon heating $KClO_3$?

Which of the following oxyacids of sulphur contains an $S-S$ linkage?

Which among the following reactions exhibits the reducing property of ozone?