H2S acts only as a reducing agent while SO2 can act both as a reducing and oxidizing agent because

Sin SO 2 has one oxidation state

H2S acts only as a reducing agent while SO2 can act both as a reducing and oxidizing agent because

Sin SO 2 has one oxidation state

Sin H 2 ,S has —2 oxidation state

hydrogen in H 2 S is more + ve than oxygen

Sin SO 2 has one oxidation state

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H₂S acts only as a reducing agent while SO₂ can act both as a reducing and oxidizing agent because

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Sin H₂,S has —2 oxidation state

hydrogen in H₂S is more + ve than oxygen

oxygen is more — ve in SO₂

Sin SO₂ has one oxidation state

answer is D.

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Detailed Solution

H₂S, the oxidation state of S is — 2. So it cannot accept more electrons because on accepting 2 electrons S acquires a noble gas configuration. So, it can acts only as a reducing agent by loosing electron. On the other hand, the oxidation state of S in SO₂, is + 4 which is an intermediate oxidation state of sulphur so it can reduce as well oxidise.

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