If the equivalent weight of an element is 32, then the percentage of oxygen in its oxide is :

Options

A. 16
B. 40
C. 32
D. 20

Answer

To solve the problem of finding the percentage of oxygen in the oxide of an element with an equivalent weight of 32, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Equivalent Weight of the Element and Oxygen:**
- Given that the equivalent weight of the element is 32 g/equiv.
- The equivalent weight of oxygen is known to be 8 g/equiv.

2. **Calculate the Equivalent Weight of the Oxide:**
- The oxide of the element consists of one equivalent of the element and one equivalent of oxygen.
- Therefore, the equivalent weight of the oxide can be calculated as:
\[ \text{Equivalent weight of oxide} = \text{Equivalent weight of element} + \text{Equivalent weight of oxygen} \]
\[ = 32 \, \text{g/equiv} + 8 \, \text{g/equiv} = 40 \, \text{g/equiv} \]

3. **Calculate the Percentage of Oxygen in the Oxide:**
- The percentage of oxygen in the oxide can be calculated using the formula:
\[ \text{Percentage of Oxygen} = \left( \frac{\text{Equivalent weight of Oxygen}}{\text{Equivalent weight of Oxide}} \right) \times 100 \]
- Substituting the values:
\[ \text{Percentage of Oxygen} = \left( \frac{8 \, \text{g/equiv}}{40 \, \text{g/equiv}} \right) \times 100 \]
\[ = \left( \frac{8}{40} \right) \times 100 = 0.2 \times 100 = 20\% \]

4. **Conclusion:**
- The percentage of oxygen in the oxide is **20%**.

### Final Answer:
The percentage of oxygen in the oxide is **20%**.

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