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Propan-1-ol (CH₃CH₂CH₂OH), a primary alcohol, is oxidized to propanoic acid (CH₃CH₂COOH) with KMnO₄, a strong oxidizing agent.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Physical Properties and Acidity of Alcohols and Phenols
In 2HI + Cl₂ → 2HCl + I₂, I (-1) loses H and electrons to become 0 in I₂, with no oxygen present.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Balancing Redox Reactions - Oxidation Number Method and Half Reaction
Reaction: 2 KMnO₄ + 10 FeSO₄ + 8 H₂SO₄ → 5 Fe₂(SO₄)₃ + 2 MnSO₄ + K₂SO₄ + 8 H₂O. Moles of FeSO₄ = 9.8/152 ≈ 0.0645 mol. 10 mol FeSO₄ need 2 mol KMnO₄; 0.0645 mol needs 0.0129 mol. Mass = 0.0129 × 158 ≈ 2.04 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Dalton's Atomic Theory and Atomic and Molecular Masses
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