What type of oxides is formed by non-metals?

Which is the correct statement regarding halogens?

In contact process, arsenic impurity has to be removed before proceeding.

What is the primary component of food preservative E220?

Which of the following is a hypohalous acid?

Which of the following compounds contain phosphorus with an oxidation state of +5?

Phosphine acts as a Lewis acid.

“Ozone is a pollutant.” True or false?