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

Question 1236

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Which of the following best explains the relatively low E°(M3+/M2+) value for Chromium (Cr)?

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Why are the E°(M3+/M2+) values generally higher (more positive) for the later members of the first transition series compared to the earlier ones?

Later metals have lower atomic radii
Later metals prefer lower oxidation states
Later metals have higher third ionisation energies due to increased nuclear charge
The hydration enthalpies decrease across the series

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What is the consequence of a metal having a negative E°(M2+/M) value when placed in 1M HCl?

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Which of the following best describes the trend in reducing strength for the ions Ti2+, V2+, Cr2+, and Fe2+ based on their E°(M3+/M2+) values?

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Why is the +2 oxidation state common and stable for most first-row transition metals?

It involves gaining electrons to fill the d subshell
It is the only oxidation state possible
It involves the loss of the relatively higher energy 4s electrons and one or two 3d electrons
It requires the least amount of energy overall