d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge

Question 81

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Why are the highest oxidation states of transition metals typically found in oxides and fluorides?

Oxygen and fluorine are large atoms.
Oxygen and fluorine are metals.
Oxygen and fluorine are highly electronegative and can stabilize the high positive charge on the metal.
They form weak bonds.

Question 82

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What is a consequence of the similar atomic radii of second and third-row transition elements (like Zr/Hf, Nb/Ta)?

It increases their reactivity.
It makes their compounds more ionic.
It makes the separation of these elements more difficult.
It decreases their melting points.

Question 83

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Why does the stability of the +2 oxidation state generally decrease from left to right across the first transition series?

Atomic size increases.
The number of d-electrons decreases.
The sum of the first and second ionization energies generally increases across the series.
Electronegativity decreases.

Question 84

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Which of the following gaseous ions, Mn3+, Cr3+, V3+, or Ti3+, is expected to be the most stable in aqueous solution based on electronic configuration?

Mn3+
Cr3+
V3+
Ti3+

Question 85

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How many unpaired electrons are present in a gaseous Ti3+ ion?

0
1
2
3

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