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

Which of the following oxyacids of sulphur contains four $S=O$ bonds?

Sulphur trioxide can be obtained by which of the following reactions?

Sulphuric acid reacts with $PCl_5$ to give

Given below are two statements:
Statement $I$: Oxygen being the first member of group $16$ exhibits only $-2$ oxidation state.
Statement $II$: Down the group $16$ stability of $+4$ oxidation state decreases and $+6$ oxidation state increases.
In the light of the above statements,choose the most appropriate answer from the options given below:

Write a note on the preparation of sulphur dioxide. Explain the properties of sulphur dioxide. State its uses.