Which one of the following ions exhibits d-d transition and paramagnetism as well?
Correct answer: D. MnO42-
- A. MnO4-
- B. CrO42-
- C. Cr2O72-
- D. MnO42-
Explanation
The correct answer is MnO42-, where manganese is in the +6 oxidation state. In this state, manganese retains d electrons, making d-d transitions possible. Moreover, the presence of unpaired electrons in the d orbitals results in paramagnetism.The other options, MnO4-, CrO42-, and Cr2O72-, have their respective metal ions in oxidation states where no d electrons are present (Mn⁷⁺ and Cr⁶⁺). Consequently, these ions cannot exhibit d-d transitions and are not paramagnetic.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
Practise Transition Elements
531 free Transition Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electronic Structure of d-Block Elements questions
What are d-block elements are called?
How many d-block elements are present in the periodic table?
Which one of the following pairs shows abnormal electronic configuration?
Which of the following is not an interstitial compound?
Transition elements and their compounds are commonly used as catalysts due to _.
When the configuration is d7 in a transition metal, the paramagnetic susceptibility will be equal to: