d and f BLOCK ELEMENTS

What gas is evolved when potassium permanganate is heated according to the decomposition reaction?

• Oxygen
• Hydrogen
• Nitrogen
• Carbon dioxide

What is the final oxidation state of manganese when KMnO₄ acts as an oxidizing agent in strongly acidic solution, as shown in the example reactions?

• +2
• +3
• +4
• +6

What is the primary reason permanganate doesn't oxidize water quickly at [H⁺] = 1 M unless special conditions are met?

• Kinetics
• Thermodynamics
• Lack of reactants
• Incorrect pH

What factor significantly influences the products formed when permanganate undergoes reduction?

• Hydrogen ion concentration
• Temperature
• Pressure
• Catalyst presence

What is the standard reduction potential (E°) for the reduction of MnO₄⁻ to MnO₄²⁻?

• +0.56 V
• +0.77 V
• +0.34 V
• +1.52 V