Among the following oxides how many of them are suboxides ?
(a) `C_(3)O_(2)` , (b) `N_(2)O` , (c ) `NO_(2)` , (d) `CO`
(e) `Fe_(3)O_(4)` , (f) `KO_(2)`

Explanation

To determine how many of the given oxides are suboxides, we first need to understand the definition of suboxides. A suboxide is defined as an oxide where the number of oxygen atoms is less than the number of atoms of the other element present in the compound.

Let’s analyze each of the given oxides step by step:

1. **(a) C₃O₂**:
- Here, we have 3 carbon atoms and 2 oxygen atoms.
- Since the number of carbon atoms (3) is greater than the number of oxygen atoms (2), C₃O₂ is a suboxide.

2. **(b) N₂O**:
- This oxide has 2 nitrogen atoms and 1 oxygen atom.
- The number of nitrogen atoms (2) is greater than the number of oxygen atoms (1), so N₂O is also a suboxide.

3. **(c) NO₂**:
- In this case, we have 1 nitrogen atom and 2 oxygen atoms.
- The number of oxygen atoms (2) is greater than the number of nitrogen atoms (1), which means NO₂ is not a suboxide.

4. **(d) CO**:
- Here, there is 1 carbon atom and 1 oxygen atom.
- The number of carbon atoms (1) is equal to the number of oxygen atoms (1), so CO is not a suboxide.

5. **(e) Fe₃O₄**:
- This oxide consists of 3 iron atoms and 4 oxygen atoms.
- The number of oxygen atoms (4) is greater than the number of iron atoms (3), so Fe₃O₄ is not a suboxide; it is classified as a mixed oxide.

6. **(f) KO₂**:
- In this case, we have 1 potassium atom and 2 oxygen atoms.
- The number of oxygen atoms (2) is greater than the number of potassium atoms (1), so KO₂ is not a suboxide; it is classified as a superoxide.

Now, let's summarize our findings:
- Suboxides identified: C₃O₂ and N₂O.
- Total number of suboxides: 2.

**Final Answer**: Among the given oxides, there are **2 suboxides**: C₃O₂ and N₂O.