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How many moles of iodine are liberated when 1 mole of potassium dichromate reacts with potassium iodide
Options
(a) 1
(b) 2
(c) 3
(d) 4
Correct Answer:
3
Explanation:
Iodine is liberated from potassium iodide.
K₂Cr₂O₇ + 4H₂SO₄ → K₂ SO₄+ Cr₂(SO₄)₃ + 4H₂O+ 3[O]
[2KI + H₂SO₄+[O] → K₂ SO₄ + I₂ +H₂O] ⨯ 3 /
[ K₂Cr₂O₇ + 6KI + 7H₂ SO₄ → 4K₂ SO₄+ Cr₂(SO₄)₃ + 7H₂O + 3I₂].
Related Questions: - At 298 K the enthalpy of formation of liquid water is -285.9 kJ/mol
- The basic character of the transition metal monoxides follows the order.
- Gas A is bubbled through slacked lime, a white precipitate is formed.
- A device that converts energy of combustion of fuels like hydrogen and methane,
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Topics: Hydrogen and Redox Reactions
(174)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- At 298 K the enthalpy of formation of liquid water is -285.9 kJ/mol
- The basic character of the transition metal monoxides follows the order.
- Gas A is bubbled through slacked lime, a white precipitate is formed.
- A device that converts energy of combustion of fuels like hydrogen and methane,
- The number of π-bond present in propyne is
Topics: Hydrogen and Redox Reactions (174)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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