Assertion:- `H_(3)PO_(4)` is a dibasic compound.
Reason:- The two H-atom are directly attached to P.

Options

A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.
B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion `&` Reason are False.

Answer

To solve the assertion and reason question regarding H₃PO₄, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
The assertion states that H₃PO₄ is a dibasic compound.

- **Definition of Dibasic**: A dibasic acid is one that can donate two protons (H⁺ ions) per molecule when dissolved in water.
- **H₃PO₄ Structure**: H₃PO₄, also known as phosphoric acid, has the following structure:
- It consists of one phosphorus atom (P) bonded to four oxygen atoms (O), with three of those oxygens bonded to hydroxyl groups (–OH).
- The structure can be represented as:
```
O
||
HO-P-OH
|
OH
```
- **Basicity of H₃PO₄**: Phosphoric acid can donate three protons (H⁺ ions) when dissolved in water, making it a tribasic acid.

**Conclusion for Assertion**: The assertion is **false** because H₃PO₄ is not dibasic; it is tribasic.

### Step 2: Analyze the Reason
The reason states that the two hydrogen atoms are directly attached to phosphorus (P).

- **Hydrogen Atoms in H₃PO₄**: In the structure of H₃PO₄, the hydrogen atoms are part of hydroxyl groups (–OH) and are not directly attached to the phosphorus atom. The phosphorus atom is bonded to oxygen atoms, and the hydrogen atoms are attached to these oxygen atoms.
- **Conclusion for Reason**: The reason is **false** because there are no hydrogen atoms directly bonded to phosphorus in H₃PO₄.

### Final Conclusion
Both the assertion and the reason are false. H₃PO₄ is a tribasic acid, and the hydrogen atoms are not directly attached to phosphorus.

### Summary of the Answer
- **Assertion**: False (H₃PO₄ is tribasic, not dibasic)
- **Reason**: False (Hydrogen atoms are not directly attached to phosphorus)