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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
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Question Type: Memory
(964)
Difficulty Level: Easy
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Topics: Structure of Atom
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Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Copper metal crystallizes with a face centred cubic (fcc) lattice .It has
- The trivial names of propanone and 3-methyl-2-butanone are
- The van’t Hoff factor for a solute that associates in solution is
- Equal volumes of two monatomic gases,A and B at same temperature and pressure
- How many FeSO₄.7H₂SO₄ will be oxidised by an acidified solution containing 9.48g
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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