Explain acidified KMnO4 is a powerful oxidising agent with 5 examples.

1.	Explain acidified KMnO4 is a powerful oxidising agent with 5 examples.
Answer» 1. In the presence of dilute sulphuric acid, potassium permanganate acts as a very strong oxidising agent. Permanganate ions is converted into Mn⁺ ion. MnO₄^- + 8H⁺ +5e^- → Mn²⁺ + 4H₂O Example: 1. Potassium permanganate oxidises ferrous salts to ferric salts. 2. Potassium permanganate oxidises iodide ions to iodine. 2MnO₄^- + 10I^-+ 16H⁺ → 2Mn²⁺ + 5I₂ + 8H₂O 3. Potassium permanganate oxidises sulphide ion to sulphur. 2MnO₄^- + 5S_^2- + 16H⁺ → 2Mn²⁺ + 5S + 8H₂O 4. Potassium permanganate oxidises oxalic acid to CO₂. 2MnO₄^- + 5(COO)^2- + 16H⁺ → 2Mn²⁺ + 10CO₂ + 10H₂O 5. Potassium permanganate oxidises alcohols to aldehyde. 2KMnO₄ + 3H₂SO₄ + 5CH₃CH₂OH → 2K₂SO₄ + 2MnSO₄ + 5CH₃CHO + 8H₂O

Answer»

1. In the presence of dilute sulphuric acid, potassium permanganate acts as a very strong oxidising agent. Permanganate ions is converted into Mn⁺ ion.

MnO₄^- + 8H⁺ +5e^- → Mn²⁺ + 4H₂O

Example: 1. Potassium permanganate oxidises ferrous salts to ferric salts.

2. Potassium permanganate oxidises iodide ions to iodine.

2MnO₄^- + 10I^-+ 16H⁺ → 2Mn²⁺ + 5I₂ + 8H₂O

3. Potassium permanganate oxidises sulphide ion to sulphur.

2MnO₄^- + 5S_^2- + 16H⁺ → 2Mn²⁺ + 5S + 8H₂O

4. Potassium permanganate oxidises oxalic acid to CO₂.

2MnO₄^- + 5(COO)^2- + 16H⁺ → 2Mn²⁺ + 10CO₂ + 10H₂O

5. Potassium permanganate oxidises alcohols to aldehyde.

2KMnO₄ + 3H₂SO₄ + 5CH₃CH₂OH → 2K₂SO₄ + 2MnSO₄ + 5CH₃CHO + 8H₂O

Discussion

No Comment Found

Related InterviewSolutions

What were the two main occupations of the Rig Vedic Aryans?
Name the two political institutions which exercised check on the powers of the King in the Rig Vedic period.
What w’as the position of women in the Rig Vedic age ?
Describe the social life of the Rig Vedic Aryans with reference to the following: (a) The Family Structure (b) Position of Women (c) Varna System
With reference to the following explain the main features of the Rig Vedic Economy: (a) Agriculture (b) Domestication of Animals (c) Trade Transactions, Crafts and Transportation
Mention any two archaeological sources to reconstruct the later Vedic Age.
Mention any two of the Ashrams in the life of a man in Aryan society.
What information do we gather from the later Vedic literature in respect of: (a) Spread of Vedic Civilization to many New Regions. (b) Role of Iron in later Vedic Economy.
Mention briefly the rituals and sacrifices of the later Vedic Aryans?
What is the message of the Bhagavad Gita?