| ⇦ | 
| ⇨ |
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: - The hybridization involved in complex [Ni(CN)₄]²⁻ is (At.No.Ni = 28)
- Which of the following reagents can be used to convert primary amides into pri
- Among the following pairs of ions, the lower oxidation state in aqueous solution
- When 1 mol of gas is heated at constant volume,temperature is raised
- Hydrolysis of an ester in an alkaline medium is
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
- The hybridization involved in complex [Ni(CN)₄]²⁻ is (At.No.Ni = 28)
- Which of the following reagents can be used to convert primary amides into pri
- Among the following pairs of ions, the lower oxidation state in aqueous solution
- When 1 mol of gas is heated at constant volume,temperature is raised
- Hydrolysis of an ester in an alkaline medium is
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
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