To which group does chlorine element belong?

What is the atomicity of halogens?

Which of the following is not formed on hydrolysis of PCl5?

Which of the following can be used to dry HCl gas?

What is the boiling point of hydrogen chloride?

The main commercial source of helium is natural gas.

Which allotrope of phosphorus does not catch fire easily?

Which of the following is formed in the first stage of the ‘salt cake’ method?