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

Question 1351

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Why is the standard electrode potential (E°) for the Fe²⁺/Fe couple less negative than that for Cr²⁺/Cr?

Fe has lower ionization energies than Cr
Cr²⁺ is more stable than Fe²⁺
The higher (less negative) hydration enthalpy of Fe²⁺ compared to Cr²⁺ contributes to Fe's less negative E°
Fe has a higher atomic number than Cr

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Based on the information about halides, which of the following compounds would you expect to be the most covalent in nature?

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What is the significance of the statement "beyond Mn no metal has a trihalide except FeX₃ and CoF₃" in understanding 3d metal chemistry?

It shows that trihalides are very common
It indicates that +3 is the most stable state for all 3d metals
It highlights a general decrease in the stability of the +3 oxidation state for 3d metals as the atomic number increases beyond Manganese
It proves that fluorine only bonds with Cobalt

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According to the provided data, which first-row transition metal has the lowest first ionization enthalpy (Δ₁H°)?

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Why does the text mention the hydrolysis of VCl₅, VBr₅, and VI₅ to form oxohalides like VOCl₃?

To show that VF₅ is unstable
To prove that all V halides are stable
To illustrate that high oxidation state halides (except fluorides) tend to be unstable and undergo hydrolysis
To compare the bond strengths of V-F and V-Cl