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Reaction of solid KMnO₄ with conc.H₂SO₄ produces manganese heptoxide (Mn₂O₇) in
Options
(a) solution state
(b) solid state
(c) fine powder
(d) none of these
Correct Answer:
solution state
Explanation:
KMnO₄ on treatment with concentrated H₂SO₄ forms manganese heptoxide via permanganyl sulphate which decomposes explosively on heating. 2KMnO₄ + 3H₂SO₄ → 2KHSO₄ + (MnO₃)₂SO₄ + 2H₂O. (MnO₃)₂SO₄ + H₂O → Mn₂O₇(Red-brown liquid) + H₂SO₄. Mn₂O₇ → 2MnO₂ + 3/2 O₂. Therefore Mn₂O₇ so formed is a red-brown liquid.
Related Questions: - Which of the following does not show electrical conduction
- Standard enthalpy of vaporisation Δvap H⁰ for water at 100⁰C is 40.66 kJ mol⁻¹.
- Which of the following complex has square planar structure
- How many grams of dibasic acid (mol.wt.200) should be present in 100 mL.
- Enthalpy of CH₄ + ¹/² O₂ → CH₃OH is negative. If enthalpy of combustion of CH₄
Topics: D and F Block Elements
(91)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following does not show electrical conduction
- Standard enthalpy of vaporisation Δvap H⁰ for water at 100⁰C is 40.66 kJ mol⁻¹.
- Which of the following complex has square planar structure
- How many grams of dibasic acid (mol.wt.200) should be present in 100 mL.
- Enthalpy of CH₄ + ¹/² O₂ → CH₃OH is negative. If enthalpy of combustion of CH₄
Topics: D and F Block Elements (91)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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