Ethylenediamine, NH2CH2CH2NH2, is a bidentate ligand. It forms coordinate bonds with the metal ion from...
Both carbons
Both nitrogens
One carbon and one nitrogen
Any combination of carbon and nitrogen atoms
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Ethylenediamine, NH2CH2CH2NH2, is a bidentate ligand. It forms coordinate bonds with the metal ion from...
Both carbons
Both nitrogens
One carbon and one nitrogen
Any combination of carbon and nitrogen atoms
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Which transition metal element has atoms with a sub-shell of 4s1?
Zinc
Iron
Copper
Vanadium
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Two complex ions, [Cr(OH)6]3- and [Cr(NH3)6]3+ both contain chromium but form different colours in solution.
Which factor is the reason for this difference?
Different ligands
Different overall charges
Different oxidation states of chromium
Different coordination numbers
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Which is not true for scandium?
It cannot form coloured solutions and compounds
It does not make a good catalyst in solution
It only forms ions with the electronic configuration of [Ar]4s03d0
The stable ion is Sc2+
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Which statement is true of the following reaction?
2Fe3+ (aq) + 2I- (aq) 2Fe2+ (aq) + I2 (aq)
Iron(III) ions are oxidised, iron(III) ions are the oxidising agent
Iron(III) ions are oxidised, iron(III) ions are the reducing agent
Iron(III) ions are reduced, iron(III) ions are the reducing agent
Iron(III) ions are reduced, iron(III) ions are the oxidising agent
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What is the bonding between the ligands and the metal ion in [Fe(H2O)6]2+?
Metallic
Ionic
Hydrogen
Dative covalent
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Which product is formed when aqueous Cr3+ ions are reacted with an excess of aqueous sodium hydroxide?
Cr(OH)63–
Cr(OH)3
[Cr(OH)4(H2O)2]–
[Cr(OH)4]-
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Which electron configuration(s) is / are correct?
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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Copper(II) ions form an aqueous complex ion, X, with chloride ions.
Which statement about X is true?
X has optical isomers
X has a square planar shape
X has the formula CuCl42+
X has a yellow colour
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Which statement(s) is / are correct for the complex Pt(NH3)2Cl2?
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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The colour change for a reaction involving a chromium compound is shown below.
Chromium(III) sulfate Blue solution
What is the change in oxidation state of chromium during this reaction?
+1
-1
+3
-3
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Which of the following ions produces identical observations when sodium hydroxide or ammonia solutions are added until in excess?
[Fe(H2O)6]2+
[Cr(H2O)6]3+
[Cu(H2O)6]2+
[Co(H2O)6]2+
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Aqueous iron(III) ions react with sodium carbonate solution.
What happens in the reaction?
Observation(s) |
Product(s) |
|
A |
Brown precipitate and effervescence |
Fe(H2O)3(OH)3 + CO2 |
B |
Brown precipitate |
Fe2(CO3)3 |
C |
Orange solution |
[Fe(H2O)5(OH)]2+ |
D |
Brown precipitate and effervescence |
Fe2(CO3)3 + CO2 |
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Which statement(s) for the complex ion [Cu(NH2CH2CH2NH2)3]2+ is/are correct?
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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What colour change would you observe in the following reaction?
[Cu(H2O)6]2+ (aq) + 4NH3 (aq) [Cu(NH3)4(H2O)2]2+ (aq) + 4H2O (aq)
Blue solution, to a light blue precipitate, to a deep blue solution
Blue solution, to a deep blue solution
Blue solution, to a light blue precipitate
Deep blue solution, to a light blue precipitate, to a blue solution
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Which electronic configuration corresponds to a transition metal that forms a pink solution?
[Ar]4s23d2
[Ar]4s03d4
[Ar]4s23d3
[Ar]4s03d5
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How many electrons are gained by the dichromate ion, Cr2O72-, when it is reduced to the chromium(III) ion, Cr3+ ?
4
5
6
7
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A substance undergoes the following separate tests to establish its identity:
Identify the substance.
FeCl2
FeSO4
Cr2(SO4)3
CrCl3
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The charges have been omitted from the complex ions shown.
Identify which one is soluble.
[Cu(H2O)2(NH3)4]
[Fe(H2O)3(OH)3]
[Cu(H2O)4(OH)2]
[Co(H2O)3(OH)3]
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