Chemistry
GATE CY topic:transition-elements PYQs
Build your understanding with focused practice from past exam papers.
How to practice topic:transition-elements
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 43. Imported answers require independent review unless marked reviewed.
Question 16
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According to molecular orbital theory, the correct ground state electronic configuration for [Co(NH₃)₆]³⁺ ion is
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Consider the figure given below, where M is a metal and L is a monodentate ligand. The σ-bonding ligand group orbital (LGO) having same symmetry with
orbital of M in the octahedral coordination geometry is 
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The pair of complex ions that exhibits the slowest outer-sphere electron-exchange reaction at 25 °C is
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Consider the given pairs of complex ions. The correct pair(s) in which each complex ion exhibits three spin-allowed d-d transitions (excluding those arising due to distortions) is(are)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 14
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An aqueous solution of Co(ClO₄)₂·6H₂O is light pink in color. Addition of conc. HCl results in an intense blue colored solution due to the formation of a new species. The new species among the following is [Given: Atomic number of Co = 27]
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The effective magnetic moment,
value for
taking into account for spin-orbit coupling is closest to[Given: Atomic number of Cr = 24, spin-orbit coupling constant
, and
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The UV-visible spectrum of [Ni(en)₃]²⁺ (en = ethylenediamine) shows absorbance maxima at 1120 cm⁻¹, 1830 cm⁻¹, and 2900 cm⁻¹.
Absorbance maximum | Electronic transition |
|---|---|
(a) 1120 cm⁻¹ | (i) ³A₂g → ³T₁g (F) |
(b) 1830 cm⁻¹ | (ii) ³A₂g → ³T₂g |
(c) 2900 cm⁻¹ | (iii) ³A₂g → ³T₁g (P) |
[Given: Atomic number of Ni = 28]
The correct match(es) between absorbance maximum and electronic transition is/are
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The complex(es) having metal-metal bond order ≥3.5 is/are
[Given: The atomic numbers of Mo, Cr, Mn, and Re are 42, 24, 25, and 75, respectively.]
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 12
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The ground state of [Cr(H₂O)₆]²⁺ is
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The complex(es) with distorted octahedral structure is (are)
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