All the metals form oxides of the type MO except

Options

A. Copper
B. Barium
C. Silver
D. Lead

Answer

To solve the question "All the metals form oxides of the type MO except," we need to analyze the oxidation states of the metals and how they combine with oxygen to form oxides. The general formula for the oxide of a metal is MO, where M is the metal and O is oxygen. In this case, oxygen has a charge of -2, which means the metal must have a charge of +2 to balance it.

### Step-by-Step Solution:

1. **Identify the Oxidation State of Metals**:
- The metals in the options need to be examined for their common oxidation states when they form oxides.

2. **Examine Each Metal**:
- **Copper (Cu)**: Copper can exist in +1 and +2 oxidation states. The oxide formed with +2 oxidation state is CuO, which is of the type MO.
- **Barium (Ba)**: Barium typically has a +2 oxidation state. The oxide formed is BaO, which is also of the type MO.
- **Silver (Ag)**: Silver primarily exists in a +1 oxidation state. The oxide formed is Ag2O, which does not fit the MO type since it has a +1 oxidation state and requires two silver atoms to balance the -2 charge of oxygen.
- **Lead (Pb)**: Lead commonly has a +2 oxidation state. The oxide formed is PbO, which is of the type MO.

3. **Determine the Exception**:
- From the analysis, we see that all metals form oxides of the type MO except for Silver (Ag), which forms Ag2O instead.

4. **Conclusion**:
- Therefore, the answer to the question is Silver (Ag), as it does not form an oxide of the type MO.

### Final Answer:
Silver (Ag) does not form oxides of the type MO.

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