The dark blue colour of the solution formed when excess of ammonia is added

⇦

⇨

The dark blue colour of the solution formed when excess of ammonia is added to a solution of copper (II) sulphate is due to the presence of the ion

Options

(a) [Cu(OH)₄(H₂O)₂]²⁻
(b) [Cu(H₂O)₆]²⁺
(c) [Cu(NH₄)₂(H₂O)₄]⁴⁺
(d) [Cu(NH₃)₄(H₂O₂)]²⁺

Correct Answer:

[Cu(NH₃)₄(H₂O₂)]²⁺

Explanation:

when excess of ammonia is added to a solution of copper (II) sulphate, then the complex compound, [Cu(NH₃)₄(H₂O₂)]SO₄ is formed which causes the formation of deep blue colour.

Related Questions:

1. The oxidation state of Fe in brown ring complex [Fe(H₂O)₅NO]SO₄ is
2. The bond length in LiF will be
3. A bivalent metal has the equivalent weight of 12. The molecular weight
4. The hybridization involved in complex [Ni(CN)₄]²⁻ is (At.No.Ni = 28)
5. Which combination is best explained by the coordinate covalent bond?

Topics: Coordination Compounds (87)
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