Sodium thiosulphate is formed when

$H_2S$ is less acidic than $H_2Te$. Why?

Which of the following statements is correct for oleum?

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:

Anomalous behaviour of oxygen is due to its

Explain the oxoacids of sulfur.