The increasing order of the crystal field splitting power of some common ligands is

Options

A. `NH_(3) lt Cl^(-) lt CN^(-) lt F^(-) lt CO lt H_(2)O`
B. `F^(-) lt Cl^(-) lt NH_(3) lt CN^(-) lt H_(2)O lt CO`
C. `Cl^(-) lt F^(-) lt H_(2)O lt NH_(3) lt CN^(-) lt CO`
D. `CO lt CN^(-) lt NH_(3) lt H_(2)O lt F^(-) lt Cl^(-)`

Explanation

To determine the increasing order of crystal field splitting power of some common ligands, we can refer to the spectrochemical series, which ranks ligands based on their ability to split the d-orbitals in transition metal complexes. The ligands that cause a greater splitting of the d-orbitals are considered stronger field ligands, while those that cause less splitting are weaker field ligands.

### Step-by-Step Solution:

1. **Understand the Spectrochemical Series**:
The spectrochemical series is a list of ligands arranged in order of their field strength. Strong field ligands cause a large splitting of the d-orbitals, while weak field ligands cause a small splitting.

2. **Identify Common Ligands**:
Some common ligands include:
- CO (carbon monoxide)
- CN⁻ (cyanide ion)
- PPh₃ (triphenylphosphine)
- NO₂⁻ (nitrite ion)
- en (ethylenediamine)
- NH₃ (ammonia)
- pyridine
- NCS⁻ (thiocyanate ion)
- H₂O (water)
- C₂O₄²⁻ (oxalate ion)
- OH⁻ (hydroxide ion)
- F⁻ (fluoride ion)
- NO₃⁻ (nitrate ion)
- Cl⁻ (chloride ion)

3. **Rank the Ligands According to their Field Strength**:
Based on the spectrochemical series, the ligands can be ranked as follows (from strongest to weakest):
- CO > CN⁻ > PPh₃ > NO₂⁻ > en > NH₃ > pyridine > NCS⁻ > H₂O > C₂O₄²⁻ > OH⁻ > F⁻ > NO₃⁻ > Cl⁻

4. **Determine the Increasing Order of Crystal Field Splitting Power**:
To find the increasing order, we need to list the ligands from weakest to strongest field strength:
- Cl⁻ < NO₃⁻ < F⁻ < OH⁻ < C₂O₄²⁻ < H₂O < NCS⁻ < pyridine < NH₃ < en < NO₂⁻ < PPh₃ < CN⁻ < CO

5. **Select the Correct Option**:
Based on the increasing order identified, the correct option from the provided choices will be the one that lists the ligands in the order from Cl⁻ to CO.

### Final Answer:
The increasing order of the crystal field splitting power of some common ligands is:
**Cl⁻ < NO₃⁻ < F⁻ < OH⁻ < C₂O₄²⁻ < H₂O < NCS⁻ < pyridine < NH₃ < en < NO₂⁻ < PPh₃ < CN⁻ < CO**