Self-test questions: Chapter 28

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What is the electronic configuration of Ti²⁺?

[Ar] 3d²

[Ar] 4s²

[Ar] 3d³

[Ar] 3d¹4s¹

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In any triad, the ionic radius of the second and third row elements are more similar to each other and less similar to the first row because

The 5d electrons screen more efficiently than the 4d electrons and the effective nuclear charge is greater than expected.

The third row elements are directly preceded by the lanthanide series La to Lu. The f electrons shield poorly in comparison to d electrons and the third row is affected by the lanthanide contraction making the atomic radii smaller than expected.

The 5d electrons screen less efficiently than the 4d electrons and the effective nuclear charge is greater than expected.

The third row elements are directly preceded by the lanthanide series La to Lu. The f electrons shield more efficiently than d electrons and the effective nuclear charge is lower than expected.

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Which of the following is not a common oxidation state of vanadium?

+ 5

+ 1

+ 4

+ 3

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The ligand 1,4,7-triazaheptane (diethylenetriamine) can form chelate rings when it forms transition metal complexes. How many chelate rings can the complex form and what is the size in each case?

Two six-membered chelate rings

One six membered ring and one five membered chelate ring

Two five membered chelate rings

One six membered chelate ring

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What is the oxidation state of chromium in the complex [Cr(H₂O)₅(SCN)]²⁺?

+1

0

+2

+3

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What is the name of the complex ion [FeBr₂(H₂O)₄]⁺

Tetraaquadibromiron(II)

Dibromotetraaquairon(III)

Tetraaquadibromoiron(III)

Dibromotetraaquairon(II)

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What is the formula of the compound lithium tetrachloroplatinate(II)

Li₂[PtCl₄]

Li[PtCl₄]

Li₂[PtCl₄]²⁺

[LiPtCl₄]⁺

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What type of isomerism is shown by the complex [Fe(en)₂Cl₂]

Linkage and geometric isomerism

Ionisation and linkage isomerism

Stereoisomerism and ionisation isomerism

Stereoisomerism and geometric isomerism

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In Hard/Soft Acid/Base theory which of the following would be described as a soft base?

F^-

SCN^-

NO₃^-

Ti⁴⁺

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The [CrO₄]^2- intense yellow in colouration, what selection rules are operating to generate the strong colour?

Laporte rule forbidden, parity allowed, spin allowed.

Laporte rule allowed, parity allowed, spin allowed.

Laporte rule forbidden parity forbidden, spin allowed.

Laporte rule forbidden, parity forbidden, spin forbidden.

Self-test questions: Chapter 28

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