d and f BLOCK ELEMENTS

Why doesn't acidified permanganate oxidize water quickly at [H⁺] = 1 M under standard conditions?

• Kinetic factors make the reaction extremely slow
• The reaction is not thermodynamically favorable
• Lack of sufficient hydrogen ions
• Permanganate is reduced instead

Which factor is explicitly mentioned as influencing the products formed during permanganate reduction?

• Hydrogen ion concentration
• Temperature
• Pressure
• Catalyst concentration

What structural feature is common to both manganate (MnO₄²⁻) and permanganate (MnO₄⁻) ions?

• Tetrahedral geometry with p-d π bonding
• Linear geometry with sp hybridization
• Octahedral geometry with d²sp³ hybridization
• Square planar geometry with dsp² hybridization

What is the primary reason for the intense color of potassium permanganate solutions?

• Charge transfer transitions involving oxygen and manganese
• d-d transitions within the manganese ion
• Reflection of purple light
• Scattering of light by the crystal lattice

Which of the following is a characteristic property of both MnO₄⁻ and MnO₄²⁻ ions mentioned in the text?

• Tetrahedral shape
• Same color
• Same magnetic property
• Same charge