Question

Which of the following statements is not correct?

• A. Copper liberates hydrogen from acids.
• B. In higher oxidation states, manganese forms stble compounds with oxygen and fluorine.
• C. $Mn^{3 +}$and $Co^{3 +}$ are oxidizing agents in aqueous solution.
• D. $Ti^{2 +}$and$Cr^{2 +}$ are reducing agents in aqueous solution.

Answer 1

Answer: (A)

Copper liberates hydrogen from acids.

Answer 2

Positive $Eº$ value of copper accounts for its inability to liberate $H_{2}$from acids.