Which statement is wrong:-

Options

A. Zeise's salt is `sp^(3)` hybridised and tetrahedral
B. Coordination number of Fe in ferrocene is 2
C. EAN of Mn in `Mn_(2)(CO)_(10)` is 35
D. All of these

Answer

To determine which statement is wrong, let's analyze each statement one by one.

### Step 1: Analyze Statement A
**Statement A:** "Zs salt is sp3 hybridized and tetrahedral."

- **Understanding Zs Salt:** The formula of Zs salt is K[PtCl3(C2H4)]·H2O.
- **Hybridization and Geometry:** Platinum (Pt) is a transition metal from the 5D series. In the presence of strong field ligands (like Cl- and C2H4), the coordination number is 4, leading to a square planar geometry.
- **Conclusion:** The correct hybridization for Zs salt is **Dsp2**, not **sp3**. Therefore, this statement is **wrong**.

### Step 2: Analyze Statement B
**Statement B:** "Coordination number of Fe in ferrocene is 2."

- **Understanding Ferrocene:** Ferrocene has a sandwich structure where iron (Fe) is sandwiched between two cyclopentadienyl (C5H5) rings.
- **Coordination Number Calculation:** Each cyclopentadienyl ring donates 5 electrons to the Fe atom, resulting in a total of 10 coordination sites.
- **Conclusion:** The coordination number of Fe in ferrocene is **10**, not **2**. Therefore, this statement is also **wrong**.

### Step 3: Analyze Statement C
**Statement C:** "EAN of Mn in Mn2(CO)10 is 35."

- **Understanding EAN (Effective Atomic Number):** EAN is calculated using the formula:
\[ \text{EAN} = Z + 2n + b \]
where \( Z \) is the atomic number of the metal, \( n \) is the number of ligands, and \( b \) is the number of bonds between metal atoms.
- **Calculating EAN for Mn2(CO)10:**
- Atomic number of Mn = 25
- Each Mn is coordinated to 5 CO ligands, so \( n = 5 \).
- There is 1 bond between the two Mn atoms, so \( b = 1 \).
- Plugging in the values:
\[ \text{EAN} = 25 + 2(5) + 1 = 25 + 10 + 1 = 36 \]
- **Conclusion:** The EAN of Mn in Mn2(CO)10 is **36**, not **35**. Therefore, this statement is also **wrong**.

### Final Conclusion
Since all three statements (A, B, and C) are incorrect, the answer is that **all of the above statements are wrong**.

### Summary of Answers:
- **Statement A:** Wrong (correct hybridization is Dsp2)
- **Statement B:** Wrong (coordination number of Fe in ferrocene is 10)
- **Statement C:** Wrong (EAN of Mn in Mn2(CO)10 is 36)