Question
Account for the following:
a. When NaBr is heated with conc.H2SO4,Br2 is produced but when NaCl is heated with conc.H2SO4,HCl is produced.
(b) H2S acts only as a reducing agent but SO2 acts both as a reducing agent as well as an oxidising agent.
(c) The acid strength decreases in the order : HCl>H2S>PH3.