There are five species P, Q, R, S and T. Spectroscopical analysis shows that P,Q and R are homonuclear diatomic species and have their bond order 2.5, 1.5 and 2.5 respectively and rest two species S and T are heteronuclear diatomic species and have bond order 3 and 2 respectively. All homonuclear diatomic species are paramagnetic and all heteronuclear species are diamagnetic in nature. P, R , S and T are monocovalent positive ion and Q is monovalent negative ion:
Q. According to given information the incorrect match is :

Options

A. `P=N_(2)^(+)`
B. `R=O_(2)^(+)`
C. `S=CO^(+)`
D. `T=CN^(+)`

Answer

To solve the problem, we need to analyze the given information about the species P, Q, R, S, and T, focusing on their bond orders and magnetic properties. We will also identify the incorrect match based on the bond orders.

### Step-by-Step Solution:

1. **Identify the Species and Their Properties:**
- P, Q, R are homonuclear diatomic species with bond orders:
- P: Bond order = 2.5
- Q: Bond order = 1.5
- R: Bond order = 2.5
- S and T are heteronuclear diatomic species with bond orders:
- S: Bond order = 3
- T: Bond order = 2

2. **Determine the Magnetic Properties:**
- All homonuclear diatomic species (P, Q, R) are paramagnetic.
- All heteronuclear diatomic species (S, T) are diamagnetic.

3. **Identify the Charge of Each Species:**
- P, R, S, and T are monopovalent positive ions.
- Q is a monovalent negative ion.

4. **Match Each Species with Known Molecular Species:**
- For P (Bond order 2.5): This matches with N₂⁺ (bond order = 2.5).
- For Q (Bond order 1.5): This matches with O₂⁻ (bond order = 1.5).
- For R (Bond order 2.5): This matches with O₂⁺ (bond order = 2.5).
- For S (Bond order 3): This should match with CO⁺ (bond order = 3.5).
- For T (Bond order 2): This matches with CN⁺ (bond order = 2).

5. **Identify the Incorrect Match:**
- The match for S is incorrect because S has a bond order of 3, while CO⁺ has a bond order of 3.5. Therefore, S does not correctly match with CO⁺.

### Conclusion:
The incorrect match is for species S, which was matched with CO⁺. Thus, the answer is that the incorrect match is option 3.

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