In 2H₂S + 4F₂ → 2SF₄ + 4HF, which element undergoes reduction?
F (0 in F₂) becomes -1 in SF₄ and HF, gaining electrons; S (-2 to +4) is oxidized.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Types of Redox Reactions - Combination Decomposition Displacement