BITSAT2014ChemistryCoordination CompoundsActual
The correct order of magnetic moments (spin only values in B.M.) is:
Options
- A[ Fe ( CN )₆ ]⁴⁻> [ MnCl ₄ ]²⁻> [ CoCl ₄ ]²⁻
- B[ MnCl ₄ ]²⁻> [ Fe ( CN )₆ ]⁴⁻> [ CoCl ₄ ]²⁻
- C[ MnCl ₄ ]²⁻> [ CoCl ₄ ]²⁻> [ Fe ( CN )₆ ]⁴⁻
- D[ Fe ( CN )₆ ]⁴⁻> [ CoCl ₄ ]²⁻> [ MnCl ₄ ]²⁻ (Atomic nos. : Mn =25, Fe =26, Co =27)
Correct answer
C. [ MnCl ₄ ]²⁻> [ CoCl ₄ ]²⁻> [ Fe ( CN )₆ ]⁴⁻
Step-by-step solution
Number of unpaired electrons in central atom [ Fe ( CN )₆ ]⁴⁻, [ CoCl ₄ ]²⁻, [ MnCl ₄ ]²⁻ zer three five The greater the number of unpaired electrons, the higher the value of magnetic moment