Most Important Selected Qs for JEE AdvancedChemistryd and f Block Elements
Cupric compounds are more stable than their cuprous counterparts in solid state. This is because
Options
- Athe endothermic character of the 2nd IP of Cu is not so high
- Bsize of Cu ²⁺ is less than Cu ⁺
- CCu ²⁺ has stabler electronic contiguration as compared to Cu ⁺
- Dthe lattice energy released for cupric compounds is much higher than Cu ⁺
Correct answer
D. the lattice energy released for cupric compounds is much higher than Cu ⁺
Step-by-step solution
Electronic configurations of cuprous ( Cu ^ * ) and cupric ( Cu ² ⁺ ) ions are as follows aligned Cu ⁺ &=[ Ar ] 3 d¹⁰ 4 s^ Cu ²⁺ &=[ Ar ] 3 d⁹ 4 s ^ aligned Thus, electronic configuration of Cu ⁺ is more stable but it is less stable because in Cu ²⁺ due to its small siag the nuclear charge is sufficient to hold 27 electrons but in Cu^+ such a condition is not true. Further, the IInd IP of Cu is not very high as compared to its Ist IP. Consequently a large amount of latsicy energy is released for cupric compounds as