Chemistry Oxidation States Quiz

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Questions and Answers

Which oxidation state is most common among the lanthanoids?

4 (correct)
3
2
5

Among the actinoid elements, which group shows the highest oxidation state of +7?

Np, Pu, Am
U, Fm, Th (correct)
Es, No, Lr
U, Th, Md

Which statement is not correct?

In lanthanoid series ionic radius of Ln3+ ions decreases
La is actually an element of transition metal series rather than lanthanide series (correct)
La(OH)2 is less basic than Lu(OH)3
Atomic radii of Zr and Hf are the same because of lanthanide contraction

Which type of isomerism is exhibited by [Pt(NH3)2Cl2]?

Linkage isomerism (C) Signup and view all the answers

Which complex is not expected to exhibit isomerism?

[Co(NH3)5 SO4]Cl (A) Signup and view all the answers

Which complex exhibits Fac-mer isomerism?

[Co(en)3]3+ (D) Signup and view all the answers

What is the most common oxidation state exhibited by lanthanoids?

3 (D) Signup and view all the answers

Which actinoid elements can show the highest oxidation state of +7?

U, Fm, Th (D) Signup and view all the answers

Which complex is not expected to exhibit isomerism?

[Co(NH3)5 SO4]Cl (C) Signup and view all the answers

Which type of isomerism is shown by [Pt(NH3)2Cl2]?

Geometrical isomerism (B) Signup and view all the answers

Which complex has a metal oxidation number of zero?

Both (b) and (c) (D) Signup and view all the answers

Which complex is paramagnetic in nature?

[Co(NH3)6]3+ (B) Signup and view all the answers

Study Notes

Lanthanoids and Actinoids

The most common oxidation state among lanthanoids is +3.
Actinoid elements that can show the highest oxidation state of +7 are Protactinium (Pa) and Neptunium (Np).

Isomerism in Complexes

[Pt(NH3)2Cl2] exhibits cis-trans isomerism.
The complex that is not expected to exhibit isomerism is [Ni(CO)4].
The complex that exhibits Fac-mer isomerism is [Co(NH3)3(NO2)3].
The complex that has a metal oxidation number of zero is [Ni(CO)4].
The complex that is paramagnetic in nature is [CoF6]3-.

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Description

Test your knowledge on oxidation states in chemistry. This quiz covers topics related to lanthanoids, actinoid elements, and properties of various compounds. Choose the correct options from the given multiple-choice questions.