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

Question 1396

▼

What would be the expected impact on the E°(M2+/M) value if an element's M2+ ion achieved a d10 configuration, based on the text's explanation for Zn?

The E°(M2+/M) value would be less negative than expected.
The E°(M2+/M) value would be unaffected.
The E°(M2+/M) value would become positive.
The E°(M2+/M) value would likely be more negative than expected from the simple thermochemical trend.

Question 1397

▼

Why is the statement 'copper's positive E° is solely due to its high ionization enthalpies' incomplete according to the text?

Because copper has low ionization enthalpies.
Because ionization enthalpies are not important.
Because the text only mentions hydration enthalpy.
Because the text emphasizes the high atomization enthalpy and insufficient hydration enthalpy as the primary reasons.

Question 1398

▼

How does the concept of half-filled subshell stability explain the redox behavior of Mn according to the text?

Mn2+ loses an electron to achieve the stable d4 configuration of Mn3+.
Mn atoms prefer the d5 configuration in their ground state.
Half-filled subshells make elements less reactive.
Mn3+ gains an electron to achieve the stable d5 half-filled configuration of Mn2+, making Mn3+ an oxidizing agent.

Question 1399

▼

What is the primary difference in the redox behavior of Cr2+ and Mn3+ despite both having d4 configurations, according to the text?

Cr2+ is more stable than Mn3+.
Mn3+ is more stable than Cr2+.
They behave identically.
Cr2+ acts as a reducing agent by losing an electron to gain stability, while Mn3+ acts as an oxidizing agent by gaining an electron to gain stability.

Question 1400

▼

Why is the E°(M2+/M) value for Mn more negative than expected from the simple trend according to the text?

Its low atomic mass.
Its high ionization enthalpy.
Its low hydration enthalpy.
Because the formation of the stable, half-filled d5 electronic configuration in Mn2+ provides extra stability not fully captured by basic thermochemical calculations.

Report Question Issue