`{:("Oxy acid","Basicity"),("A) "H_(3)PO_(2),"1) Tribasic"),("B) "H_(3)PO_(3),"2) Mono basic"),("C) "H_(3)PO_(4),"3) Tetrabasic"),("D) "H_(4)P_(2)O_(6),"4) Dibasic"):}`
The correct match is

Options

A. `{:(A,B,C,D),(3,2,1,4):}`
B. `{:(A,B,C,D),(2,4,1,3):}`
C. `{:(A,B,C,D),(2,1,3,4):}`
D. `{:(A,B,C,D),(1,2,3,4):}`

Answer

To determine the correct matches of oxy acids with their basicity, we will analyze each compound based on the number of hydroxyl (OH) groups present in their structures. The basicity of an acid is defined by the number of ionizable hydrogen ions (H⁺) it can donate, which corresponds to the number of OH groups in the acid.

### Step-by-Step Solution:

1. **Identify the first compound: H₃PO₂ (Hypophosphorous acid)**
- Structure: H₃PO₂ has one OH group.
- Basicity: Since there is one OH group, it is **monobasic**.
- Match: H₃PO₂ → 1) Monobasic

2. **Identify the second compound: H₃PO₃ (Phosphorous acid)**
- Structure: H₃PO₃ has two OH groups.
- Basicity: Since there are two OH groups, it is **dibasic**.
- Match: H₃PO₃ → 4) Dibasic

3. **Identify the third compound: H₃PO₄ (Phosphoric acid)**
- Structure: H₃PO₄ has three OH groups.
- Basicity: Since there are three OH groups, it is **tribasic**.
- Match: H₃PO₄ → 2) Tribasic

4. **Identify the fourth compound: H₄P₂O₆ (Hypophosphoric acid)**
- Structure: H₄P₂O₆ has four OH groups.
- Basicity: Since there are four OH groups, it is **tetrabasic**.
- Match: H₄P₂O₆ → 3) Tetrabasic

### Summary of Matches:
- H₃PO₂ → 1) Monobasic
- H₃PO₃ → 4) Dibasic
- H₃PO₄ → 2) Tribasic
- H₄P₂O₆ → 3) Tetrabasic

### Final Match:
The correct match is:
- A) H₃PO₂ → 1) Monobasic
- B) H₃PO₃ → 4) Dibasic
- C) H₃PO₄ → 2) Tribasic
- D) H₄P₂O₆ → 3) Tetrabasic

### Correct Option:
The correct option is: **A-1, B-4, C-2, D-3**

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