Question

Give reasons for the following: 

(i) Transition metals form alloys. 

(ii) Mn₂O₃ is basic whereas Mn₂O₇ is acidic. 

(iii) Eu²⁺ is a strong reducing agent. 

Answer 1

(i) Atoms of transition metal can easily take place in the crystal lattice of another metal in the molten state and are miscible with each other and thus forms alloys. 

(ii) With increase in the oxidation state of a given transition metal (i.e. Mn), the covalent character of its compound increases and thus acidic character also increases. Therefore, Mn₂O₃ (oxidation state = + 3) is basic while Mn₂O₇ (oxidation state = +7) is acidic. 

(iii) Eu²⁺ having electronic configuration [Xe]4ƒ” is a strong reducing agent because in the aqueous solution, it reverts back to the most stable + 3 oxidation state.