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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following method, is commonly used method for destruction of
- A gas deviates from ideal behaviour at a high pressure because its molecules
- The volume of 0.05 M KMnO₄ solution required to oxidized completely 2.70g
- A primary alcohol,C₃H₈O (A) on heating with sulphuric acid undergo dehydration
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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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