Question
What is the EAN of metal ion in [ Cu(NH _3)_4]^ 2+ ?
MHT CET
Chemistry
Coordination Compounds
2026
MHT CET 2026 (17 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 35
- B. 27
- C. 29
- D. 36
Answer
A. 35
Step-by-step solution
The effective atomic number (EAN) is calculated using the formula: EAN = Z - O.S. + 2 C.N. For the complex [ Cu(NH _3)_4]^ 2+ : Atomic number of copper (Z) = 29 Oxidation state of copper ( O.S. ) = +2 Coordination number ( C.N. ) = 4 Substituting the values: EAN = 29 - 2 + 2 4 EAN = 27 + 8 = 35 Answer: 35
Related: Chemistry — Coordination Compounds · All PYQ Banks