NEET2018Chemistryd and f Block ElementsActual
If M is element of actinoids series, the degree of complex formation decreases in the order
Options
- AM ⁴⁺ M ³⁺ MO ₂²⁺ MO ₂⁺
- BM ⁴⁺ MO ₂²⁺ M ³⁺ MO ₂⁺
- CMO ₂⁺ MO ₂²⁺ M ³⁺ M ⁴⁺
- DMO ₂²⁺ MO ₂⁺ M⁴⁺ M³⁺
Correct answer
B. M ⁴⁺ MO ₂²⁺ M ³⁺ MO ₂⁺
Step-by-step solution
The higher the charge on the metal ion, smaller is the ionic size and more is the complex forming ability. Thus, the degree of complex formation decreases in the order M ⁴⁺ MO ₂²⁺ M ³⁺ MO ₂⁺ The higher tendency of complex formation of MO ₂²⁺ as compared to M ³⁺ is due to high concentration of charge on metal atom M.