Who first recognized sulfur as an element?

What is the reaction involved in Holmes signal?

Which of the following conditions is the most suitable for manufacture of sulfuric acid in contact process?

What is the liquid product formed on decomposition of PCl5?

In the Haber-Bosch process, what is formed by the reaction of natural gas and steam?

What are interhalogen compounds used as?

Phosphine acts as a Lewis acid.

What colour does the compound dinitrogen trioxide appear in its liquid state?