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Which of the following is used to prepare Cl₂ gas at room temperature from concentrated HCl
Options
(a) MnO₂
(b) H₂S
(c) KMnO₄
(d) Cr₂O₃
Correct Answer:
KMnO₄
Explanation:
KMnO₄ oxidised halogen acids to halogen. 2KMnO₄ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 3H₂O + 5O, [2HCl + O → H₂O + Cl₂] * 5. 2KMnO₄ + 3H₂SO₄ + 10HCl → K₂SO₄ + 2MnSO₄ + 8H₂O + 5Cl₂.
Therefore KMnO₄ is used to prepare Cl₂ from concentrated HCl.
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Topics: P Block Elements in Group 15
(89)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Volume of 0.1 M K₂Cr₂O₇ required to oxidize 35 mL of 0.5 M FeSO₄ solution is
- In a homonuclear molecule, which of the following sets of orbitals is degenerate?
- In the electrolysis of aqueous solution of CuSO₄ using copper electrodes, the
- Ratio of Cᵥ and Cᵥ of the gas X is 1.4. The number of atoms of the gas X present
- In which of the following resonance will be possible
Topics: P Block Elements in Group 15 (89)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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