d and f BLOCK ELEMENTS

Which of the following substances would be oxidized by acidified potassium dichromate according to the text?

• Tin(IV) salts
• Chromium(III) salts
• Potassium salts
• Tin(II) salts

What is the standard electrode potential (E°) given for the reduction of dichromate ion in acidic solution?

• 1.51V
• 1.33V
• 0.77V
• -0.41V

In the provided acidic solution half-reaction for dichromate, how many electrons are involved? Cr2O7^2- + 14H+ + 6e- -> 2Cr^3+ + 7H2O

• 2
• 3
• 6
• 14

What is the primary use of potassium dichromate mentioned in the text?

• As a catalyst
• As a primary standard in volumetric analysis
• As a pigment
• As a reducing agent

Which dichromate salt is described as having greater solubility in water?

• Potassium dichromate
• Sodium dichromate
• Both have equal solubility
• Solubility depends on temperature only