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Reduction involves electron gain. Cu (+2 in CuCl₂) gains electrons to become Cu (0).
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Types of Redox Reactions - Combination Decomposition Displacement
Reduction involves gain of electrons. Here, Cu²⁺ from CuSO₄ gains 2 electrons to form Cu (oxidation state 0), indicating reduction.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Balancing Redox Reactions - Oxidation Number Method and Half Reaction
TeO₂ (Te: +4 to 0) gains electrons, reduced by H₂ (0 to +1).
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation
F (0 in F₂) becomes -1 in NaF, gaining electrons.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation
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