Question

Which of the following statements regarding transition elements is incorrect?

(a) Ti²⁺ and Cr²⁺ are reducing agents in aqueous medium

(b) Mn³⁺ and Co³⁺ are oxidising agents in aqueous solution

(c) In its higher oxidation state, manganese forms stable compounds with oxygen and fluorine

(d) Copper liberates hydrogen from acids

Answer 1

Correct option is (d) Copper liberates hydrogen from acids

Copper lies below hydrogen in the electrochemical series and hence does not liberate H₂ from acids. The other three options are correct.