In which of the following compounds, oxygen exhibits +2 oxidation state ?

Options

A. `H_(2)O`
B. `H_(2)O_(2)`
C. `OF_(2)`
D. `H_(2)SO_(4)`

Answer

To determine in which of the given compounds oxygen exhibits a +2 oxidation state, we will analyze each compound one by one and calculate the oxidation states of oxygen.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds we need to analyze are H2O, H2O2, OF2, and H2SO4.

2. **Calculate Oxidation State in H2O**:
- In water (H2O), hydrogen (H) has an oxidation state of +1.
- The equation for the oxidation state of oxygen (O) can be set up as follows:
\[ 2(+1) + x = 0 \quad \text{(where x is the oxidation state of O)} \]
- Solving for x:
\[ 2 + x = 0 \implies x = -2 \]
- Therefore, in H2O, oxygen exhibits an oxidation state of -2.

3. **Calculate Oxidation State in H2O2**:
- In hydrogen peroxide (H2O2), the oxidation state of hydrogen is still +1.
- The equation for the oxidation state of oxygen can be set up as:
\[ 2(+1) + 2x = 0 \]
- Solving for x:
\[ 2 + 2x = 0 \implies 2x = -2 \implies x = -1 \]
- Therefore, in H2O2, oxygen exhibits an oxidation state of -1.

4. **Calculate Oxidation State in OF2**:
- In oxygen difluoride (OF2), fluorine (F) has an oxidation state of -1.
- The equation for the oxidation state of oxygen can be set up as:
\[ x + 2(-1) = 0 \]
- Solving for x:
\[ x - 2 = 0 \implies x = +2 \]
- Therefore, in OF2, oxygen exhibits an oxidation state of +2.

5. **Calculate Oxidation State in H2SO4**:
- In sulfuric acid (H2SO4), hydrogen has an oxidation state of +1, and sulfur (S) typically has an oxidation state of +6.
- The equation for the oxidation state of oxygen can be set up as:
\[ 2(+1) + x + 6 = 0 \]
- Solving for x:
\[ 2 + x + 6 = 0 \implies x + 8 = 0 \implies x = -2 \]
- Therefore, in H2SO4, oxygen exhibits an oxidation state of -2.

### Conclusion:
After analyzing all the compounds, we find that the only compound in which oxygen exhibits a +2 oxidation state is **OF2**.

### Final Answer:
**Oxygen exhibits +2 oxidation state in OF2.**

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