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

Question 1441

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Which factor primarily determines why only oxidizing acids react with copper?

The low reactivity of copper.
The high concentration of the acid.
The negative E° value of the Cu2+/Cu couple.
The positive E° value of the Cu2+/Cu couple.

Question 1442

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If a metal's E°(M2+/M) value is calculated to be more negative than its observed value, what might this imply about the factors considered in the calculation?

The calculation is perfectly accurate.
The calculation underestimates the energy cost.
The calculation overestimates the energy gain.
The calculation might overestimate the energy cost or underestimate the energy gain.

Question 1443

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What role does crystal field stabilization energy (CFSE) play in the hydration of transition metal ions like Cu2+?

It is the primary factor determining hydration enthalpy.
It has no effect on hydration enthalpy.
It only applies to high-spin complexes.
It can influence the effective size and polarizability of the ion, affecting the hydration enthalpy.

Question 1444

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Why is the sum of the first and second ionization enthalpies important for determining the M2+/M electrode potential trend?

Because it determines the hydration enthalpy.
Because it is always constant across the series.
Because it represents the only energy change in the process.
Because it represents a major energy cost in the process M(s) → M2+(aq).

Question 1445

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Comparing the E°(M2+/M) values, which metal is expected to be the strongest reducing agent among the first transition series elements?

The metal with the least negative E° value.
The metal with a positive E° value.
The metal with the E° value closest to zero.
The metal with the most negative E° value.

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