Question

Select the correct statement(s)

• A. Stabilities of variable oxidation states can be explained by standard electrode potential
• B. $Cr ^{2+}$ is unstable and $Cr ^{3+}$ is stable in aqueous solution
• C. $Fe ^{2+}$ is stable and $Fe ^{3+}$ is unstable in aerated water
• D. All of the above are correct statements

Answer 1

Answer: (A), (B)

Correct answer is (a) Stabilities of variable oxidation states can be explained by standard electrode potentialCorrect answer is (b) $Cr ^{2+}$ is unstable and $Cr ^{3+}$ is stable in aqueous solution