Question

Why h2so4 acts as o.a only but h2s. Acts as r.a only

Answer 1

The oxidation state of sulfur in H2S is -2 whereas in case of SO2 it is +4.The minimum and maximum oxidation state of sulfer is -2 and and +6.Thus for H2S it can only reduce or donate electron whereas in case of sulfurdioxide it can change its oxidation number either from +4 to-2(reduction) and +4 to+6 (oxidation)

Answer 2

Answer:

The oxidation state of sulfur in H2S is -2 whereas in case of SO2 it is +4.The minimum and maximum oxidation state of sulphur is -2 and and +6.Thus for H2S it can only reduce or donate electron whereas in case of sulphurdioxide it can change its oxidation number either from +4 to-2(reduction) and +4 to+6 (oxidation)