How many electrons are involved in the reduction of 1 mole of SO₄²⁻ to S in acidic medium?
SO₄²⁻ + 8H⁺ + 6e⁻ → S + 4H₂O . 6 electrons per mole.
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Variation of Conductivity with Concentration and Measurement