$A$ gas which exists in three allotropic forms $\alpha$,$\beta$ and $\gamma$ 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:

Which of the following reactions is $NOT$ given by $SO_2$?

The incorrect statement$(s)$ about $O_3$ is (are):

What is the color of $\alpha$-sulphur?

The triatomic species of elemental oxygen is known as