The basic character of the transition metal monoxide follows the order

Options

A. VO > CrO > TiO > FeO
B. CrO > VO > FeO > TiO
C. TiO > FeO > VO > CrO
D. TiO > VO > CrO > FeO

Answer

To determine the order of basic character of transition metal monoxides (TiO, V2O, CrO, FeO), we need to analyze the trend in basicity across the transition metals based on their atomic size and effective nuclear charge.

### Step-by-Step Solution:

1. **Identify the Transition Metals**: The transition metals in question are Titanium (Ti), Vanadium (V), Chromium (Cr), and Iron (Fe).

2. **Understand Basic Character**: The basic character of metal oxides generally decreases as we move from left to right across a period in the periodic table. This is due to the increase in effective nuclear charge, which makes it harder for the metal to lose electrons and thus reduces its electropositive character.

3. **Arrange the Metals by Atomic Radius**: The atomic radius decreases from left to right across a period. The order of atomic radius for the given metals is:
- Titanium (Ti) > Vanadium (V) > Chromium (Cr) > Iron (Fe)

4. **Relate Atomic Size to Basic Character**: As the atomic size decreases (moving from Ti to Fe), the effective nuclear charge increases. This leads to a decrease in the basic character of the corresponding metal oxides:
- TiO > V2O > CrO > FeO

5. **Conclude the Order of Basic Character**: Based on the analysis, the order of basic character for the transition metal monoxides is:
- TiO (most basic) > V2O > CrO > FeO (least basic)

6. **Select the Correct Option**: Among the given options, the one that matches this order is the correct answer.

### Final Answer:
The basic character of the transition metal monoxide follows the order: **TiO > V2O > CrO > FeO**.

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