Which of the following gases can be dried by conc. `H_2SO_4` ?

Which of the following gas is not dried by conc. H_(2)SO_(4) ?

Which of the following gas is not dried by conc. H_(2)SO_(4) ?

Hot conc. H_2SO_4 acts as moderately strong oxidising agent. It oxidises both metals and non metals. Which of the following element is oxidised by conc. H_2SO_4 into two gaseous products?

Which of the following alkynes is insoluble in conc. H_2SO_4 ?

Hot Conc. H_2SO_4 acts as a moderately strong oxidising agents and oxides both metals and non- metals.Which of the following element is oxidised by Conc. H_2SO_4 into two gaseous products ?