| ⇦ | 
| ⇨ |
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: - If r is the radius of the first orbit, the radius of nth-orbit of H-atom is given
- If pH of a saturated solution of Ba(OH)₂ is 12, the value of its Ksp is
- The element that does not show catenation among the following p-block elements is
- A helium, molecule is two times heavier than a hydrogen molecule at 298 K
- When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat
Topics: Hydrogen and Redox Reactions
(174)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If r is the radius of the first orbit, the radius of nth-orbit of H-atom is given
- If pH of a saturated solution of Ba(OH)₂ is 12, the value of its Ksp is
- The element that does not show catenation among the following p-block elements is
- A helium, molecule is two times heavier than a hydrogen molecule at 298 K
- When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat
Topics: Hydrogen and Redox Reactions (174)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply