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Which one of the following ions has electronic configuration[Ar] 3d⁶? (At. no: Mn=25, Fe=26, Co=27, Ni=28)
Options
(a) Ni³⁺
(b) Mn³⁺
(c) Fe³⁺
(d) Co³⁺
Correct Answer:
Co³⁺
Explanation:
Ni³⁺ (28) = [Ar] 3d⁷
Mn³⁺ (25) = [Ar] 3d⁴
Fe³⁺ (26) = [Ar] 3d⁵
Co³⁺ (27) = [Ar] 3d⁶
Related Questions: - When acetic acid is heated with phosphorus pentaoxide(P₂O₅), the compound
- The solubility product of a sparingly soluble salt AX₂ is 3.2 ˣ 10⁻¹¹.
- On electrolysis of dilute H₂SO₄ using plantinum electrodes , the gas evolved at
- Which one of the following forms with an excess of CN⁻ (cyanide) a complex
- Benzenamine reacts with excess bromine to produce
Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Structure of Atom
(90)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When acetic acid is heated with phosphorus pentaoxide(P₂O₅), the compound
- The solubility product of a sparingly soluble salt AX₂ is 3.2 ˣ 10⁻¹¹.
- On electrolysis of dilute H₂SO₄ using plantinum electrodes , the gas evolved at
- Which one of the following forms with an excess of CN⁻ (cyanide) a complex
- Benzenamine reacts with excess bromine to produce
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Structure of Atom (90)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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