Identify the incorrect statement regarding ozone $(O_3)$.

Identify the method used to obtain $SO_2$ gas in industry.

When sulphur is boiled with $Na_2SO_3$ solution,the compound formed is

Choose the correct statements from the following:
$A$. All group $16$ elements form oxides of general formula $EO_2$ and $EO_3$ where $E=S, Se, Te$ and $Po$. Both the types of oxides are acidic in nature.
$B$. $TeO_2$ is an oxidising agent while $SO_2$ is reducing in nature.
$C$. The reducing property decreases from $H_2S$ to $H_2Te$ down the group.
$D$. The ozone molecule contains six lone pairs of electrons.
Choose the correct answer from the options given below:

Explain the industrial manufacturing of sulphuric acid by the contact process.

In which of the following is the formation of polyanions maximum?