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Exam:
101 quizzes
The iron(II) complex [Fe(CN)₆]⁴⁻ is octahedral. Which pair of terms describes it? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
How many unpaired electrons does the octahedral complex [Ni(NH₃)₆]²⁺ have? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
The tetrahedral ion [FeCl₄]²⁻ contains iron(II). How many unpaired electrons does it have? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Cr³⁺ forms four octahedral complexes: with Cl⁻, with H₂O, with NH₃ and with CN⁻. Which complex absorbs light of the shortest wavelength? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Which of these complexes is expected to be colourless in solution? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
A student says that the high spin ion [Mn(H₂O)₆]²⁺ has a CFSE of -2.0 Δo, because all five d electrons go into the t_2g set. What is the mistake? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Seven d electrons sit in a strong octahedral field, so the complex is low spin, with Δo = 190 kJ/mol. Find the stabilisation energy from the splitting alone. New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
An octahedral d⁴ ion is first bound to a weak ligand and shows 4 unpaired electrons. A stronger ligand then replaces it, and the complex shows 2 unpaired electrons. Which statement explains this? New
High School (11–12) · Bonding: Valence Bond and Crystal Field Theory
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Hard
A chemist dissolves 0.0150 mol of [Co(en)₂Br₂]Br in water and adds excess silver nitrate. How many moles of silver bromide form at once? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Exactly two geometrical isomers are possible for one of the following. Which one? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
An octahedral complex has the formula MA₃BCD. How many geometrical isomers does it have? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
A student draws the A ligands of MA₃B₃ at the top, right and front corners. Then she draws them at the top, right and back corners, and says these are two different fac isomers. What is wrong? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Which complex is optically active? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
A polarimeter reads -6.0° for a tube of the pure (-) enantiomer of a chiral complex. Another tube, filled to the same level at the same concentration, holds a mixture of 95 percent (-) and 5 percent (+). What does the polarimeter read for the mixture? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Hard
How many stereoisomers, counting each enantiomer, has the octahedral ion [Co(en)(NH₃)₂Cl₂]⁺? New
High School (11–12) · Isomerism in Coordination Compounds
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Hard
The compound RhCl₃· ₅NH₃ gives 2 mol of silver chloride for each mole when excess silver nitrate is added to its solution. How many ions does one formula unit give in water? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
What is the coordination number of copper in [Cu(en)₂(H₂O)₂]²⁺, where en is ethane-1,2-diamine? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
What is the oxidation state of cobalt in Na₃[Co(NO₂)₆], where the nitrite ion has a charge of -1? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Which is the correct IUPAC name for the complex salt K₃[Al(C₂O₄)₃], in which three oxalate ions are bonded to aluminium? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Which formula belongs to potassium tetrachloridonickelate(II)? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Why is the nitrite ion called an ambidentate ligand? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Every two ammonia ligands of [Zn(NH₃)₄]²⁺ are replaced by one ethane-1,2-diamine to give [Zn(en)₂]²⁺. What happens to the coordination number and the charge? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Hard
A student names K₂[Zn(CN)₄] as potassium tetracyanidozinc(II). What is the mistake? New
High School (11–12) · Werner's Theory, Ligands and Nomenclature
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Hard
Which of these 3+ ions has the greatest number of unpaired electrons? New
High School (11–12) · Lanthanoids and Actinoids (f-Block)
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
The lanthanoid contraction arises mainly because New
High School (11–12) · Lanthanoids and Actinoids (f-Block)
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
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