d and f BLOCK ELEMENTS

What is the main product formed when acidified potassium dichromate oxidizes iodides according to the text?

• Iodide ions
• Iodate ions
• Iodine
• Hypoiodous acid

Which of the following best describes the structure of the dichromate ion?

• A single tetrahedron
• Two tetrahedra sharing one corner
• A linear molecule
• A planar molecule

What is the primary oxidation state of chromium in the compounds discussed (chromates and dichromates)?

• +3
• +6
• +7
• 0

What would be the color change if a basic solution containing yellow chromate ions is acidified?

• Orange to yellow
• Yellow to orange
• No color change
• Colorless to yellow

Which ion is formed when dichromate ions react with hydroxide ions (OH-) according to the text?

• Dichromate ion (Cr2O7^2-)
• Chromate ion (CrO4^2-)
• Permanganate ion (MnO4^-)
• Manganate ion (MnO4^2-)