#mole calculation

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N (+5 in HNO₃) to +2 in NO: 2 N gain 6 electrons. As (+3 to +5): 3 As lose 6 electrons. Per HNO₃ = 6/2 = 3.

Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation

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S (+4 in SO₂) to 0 in S: 1 S gains 4 electrons. 2 H₂S (S: -2 to 0): 2 S lose 4 electrons total. Per SO₂ = 4.

Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation

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