134 public questions tagged with this topic.
In NiCl₂ · 6H₂O, formulated as [Ni(H₂O)6]Cl₂, the primary valence is the oxidation state of Ni, satisfied by 2 ionizable Cl^- ions, so it is 2. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Relevant Chemistry topic covering principles and examples as per NCERT.
[Co(NH₃)5Cl]NO₂Cl swaps Cl^- and NO₂^- with [Co(NH₃)5NO₂]Cl₂, exhibiting ionization isomerism. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.
Given: What is the oxidation state of cobalt in [Co(en)2Cl₂]Cl ? Formula: The complex charge is +1 (balanced by 1 Cl⁻), so Co’s oxidation state is x - 2 = +1, x = +3 .. Substitution & Calculation: In [Co(en)2Cl₂]+, 2 en are neutral, 2 Cl^- contribute -2. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII), Chapter: Electrochemistry (Latest NCERT 2026-27), Topic: Faraday's laws, charge required to reduce Al³⁺, 3F = 3 × 96500 C
[Co(NH₃)6]Cl₃ dissociates into [Co(NH₃)6]^{3+ and 3 Cl^- ions, producing a total of 4 ions in solution. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.
A bidentate ligand binds through two donor atoms. H₂NCH₂CH₂NH₂ (ethane-1, 2-diamine or en) has two nitrogen atoms that can coordinate, making it bidentate, unlike NH₃, Cl^-, or H₂O, which are unidentate.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Relevant Chemistry topic covering principles and examples as per NCERT.
For the same metal and ligands, the tetrahedral splitting ( Δ_t ) is 4/9 of the octahedral splitting ( Δ_o ), due to fewer ligands and different geometry.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Coordination Compounds and d Block Elements, Topic: Colour of [Ti(H₂O)₆]³⁺, d-d transition, crystal field theory.
In [Ni(NH₃)4Cl₂]Cl₂, the 2 Cl− ions outside the coordination sphere are ionizable and precipitate as AgCl, while the 2 inside are ligands. Thus, 2 moles form.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
In [Fe(H₂O)5Cl]SO₄, the coordination sphere [Fe(H₂O)5Cl]+ contains 5 H₂O molecules as ligands.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
In [Cu(en)2]2+, each ethane-1,2-diamine (en) is bidentate, contributing 2 donor atoms. Total = 2 × 2 = 4.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
In [Co(H₂O)4Cl₂]Cl, the 1 Cl− outside the coordination sphere is ionizable and forms AgCl, while the 2 inside are ligands. Thus, 1 mole precipitates.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
NO₂− can bind via N (nitro) or O (nitrito), making it ambidentate, unlike unidentate H₂O or NH₃.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
[Ni(CN)4]2− (Ni₂+, d8) with 4 strong field CN− ligands is square planar and diamagnetic (0 unpaired electrons).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
