d and f BLOCK ELEMENTS

Which of the following is a key reason potassium permanganate is used for bleaching textiles?

• Its strong reducing power
• Its ability to form complexes
• Its strong oxidizing power
• Its acidic nature

Why is hydrochloric acid unsuitable for acidifying solutions in permanganate titrations?

• Because it neutralizes the permanganate
• Because it forms a precipitate
• Because chloride ions are oxidized to chlorine gas
• Because it reduces the permanganate too quickly

In the catalysed oxidation of manganous salt by potassium permanganate in neutral or faintly alkaline solution, what is the product containing manganese?

• Manganese metal
• Manganese(III) oxide
• Manganese dioxide
• Potassium manganate

What is the final oxidation state of sulfur in the products when potassium permanganate reacts with thiosulphate ion in neutral or faintly alkaline solution?

• +2
• +4
• +6
• 0

In the oxidation of iodide ion by potassium permanganate in neutral or faintly alkaline solution, what is the final oxidation state of iodine in the product?

• 0
• +1
• +5
• +7