Question

Which of the following statements is not correct ?

• A. Copper liberates hydrogen from acids
• B. In its higher oxidation states, manganese forms stable compounds with oxygen and fluorine
• C. $M{n}^{3-}$ and $C{o}^{3+}$ are oxidising agents in aqueous solution.
• D. $T{i}^{2+}$and $C{r}^{2+}$ are reducing agents in aqueous solution

Answer 1

The correct option is A Copper liberates hydrogen from acids

$Cu$ lies below hydrogen in the electrochemical series and hence does not liberate $H_2$ from acids. Therefore (a) is not correct.