d and f BLOCK ELEMENTS

Which of the following is an example of a high oxidation state species for Chromium?

• Cr³⁺ in CrCl₃
• Cr²⁺ in CrSO₄
• Cr⁶⁺ in CrO₄²⁻
• Cr⁰ in Cr(CO)₆

What is the main reason for the variability of oxidation states in transition elements?

• High nuclear charge
• Large atomic size
• Incomplete filling of d orbitals
• High electronegativity

In group 6 of the d-block, which element's +6 oxidation state is generally more stable compared to Chromium?

• Chromium
• Molybdenum
• Tungsten
• All are equally stable

Which of the following elements is the most likely to show a stable +7 oxidation state?

• Scandium
• Titanium
• Manganese
• Zinc

How do the oxidation states of d-block elements typically differ from each other?

• By two units
• By unity (1)
• By three units
• They are always the same