Question
Which of the following statements is not correct?
A.
Copper liberates hydrogen from acids.
B.
In 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 :
Copper liberates hydrogen from acids.
Solution :
Positive $${E^ \circ }$$ value of copper accounts for its inability to liberate $${H_2}$$ from acids.