In the reaction, `H_(2)SO_(4)+P_(2)O_(5)overset(Delta)to (X)+SO_(3)`, the product (X) is :

Options

A. `PH_(3)`
B. `H_(3)PO_(4)`
C. `HPO_(3)`
D. `H_(4)P_(2)O_(7)`

Answer

To solve the reaction \( H_2SO_4 + P_2O_5 \overset{\Delta}{\rightarrow} (X) + SO_3 \) and identify the product (X), we can follow these steps:

### Step 1: Understand the Reactants
We have two reactants:
- Sulfuric acid (\( H_2SO_4 \))
- Phosphorus pentoxide (\( P_2O_5 \))

### Step 2: Identify the Reaction Type
This reaction is a dehydration reaction where sulfuric acid reacts with phosphorus pentoxide. Phosphorus pentoxide is a strong dehydrating agent.

### Step 3: Write the Reaction
When sulfuric acid reacts with phosphorus pentoxide, it typically forms metaphosphoric acid and sulfur trioxide. The balanced reaction can be represented as:
\[ H_2SO_4 + P_2O_5 \rightarrow HPO_3 + SO_3 \]

### Step 4: Identify the Product (X)
From the balanced reaction, we can see that the product (X) formed is metaphosphoric acid, which has the chemical formula \( HPO_3 \).

### Conclusion
Thus, the product (X) in the reaction is:
\[ X = HPO_3 \]

### Final Answer
The correct option for the given question is Option C, \( HPO_3 \).

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