Which chemical reaction contains incorrect products?

Options

A. `SnSO_(4) overset(Delta)to SnO_(2)+SO_(3)uarr+SO_(2)uarr`
B. `Ag_(2)C_(2)O_(4) overset(Delta)toAg+CO_(2)uarr`
C. `P_(4)O_(10)(s)+CaO(s)overset(Delta)toCa_(3)(PO_(4))_(2)`
D. `PbCl_(4)overset(Delta)toPbCl_(2)+Cl_(2)uarr`

Explanation

To determine which chemical reaction contains incorrect products, we will analyze each of the given reactions step by step.

### Step 1: Analyze the First Reaction
The first reaction is:
\[ \text{SnSO}_4 \xrightarrow{\text{heat}} \text{SnO}_2 + \text{SO}_3 + \text{SO}_2 \]

- **Analysis**: This reaction suggests that tin(II) sulfate decomposes into tin(IV) oxide, sulfur trioxide, and sulfur dioxide upon heating. However, the formation of sulfur trioxide (SO3) is incorrect.

- **Correct Products**: The correct products of the thermal decomposition of SnSO4 are:
\[ \text{SnO}_2 + \text{SO}_2 \]
Thus, SO3 is not formed.

### Step 2: Analyze the Second Reaction
The second reaction is:
\[ \text{Ag}_2\text{C}_2\text{O}_4 \xrightarrow{\text{heat}} \text{Ag} + \text{CO}_2 \]

- **Analysis**: This reaction indicates that silver oxalate decomposes upon heating to produce silver and carbon dioxide.

- **Correct Products**: This reaction is correct as it accurately represents the decomposition of silver oxalate.

### Step 3: Analyze the Third Reaction
The third reaction is:
\[ \text{P}_4\text{O}_{10} + \text{CaO} \xrightarrow{\text{heat}} \text{Ca}_3\text{(PO}_4\text{)}_2 \]

- **Analysis**: This reaction suggests that phosphorus pentoxide reacts with calcium oxide to form calcium phosphate.

- **Correct Products**: This reaction is also correct as it accurately represents the formation of calcium phosphate.

### Step 4: Analyze the Fourth Reaction
The fourth reaction is:
\[ \text{PbCl}_4 \xrightarrow{\text{heat}} \text{PbCl}_2 + \text{Cl}_2 \]

- **Analysis**: This reaction indicates that lead(IV) chloride decomposes upon heating to produce lead(II) chloride and chlorine gas.

- **Correct Products**: This reaction is correct as it accurately represents the decomposition of lead(IV) chloride.

### Conclusion
After analyzing all four reactions, we find that the first reaction is the only one that contains incorrect products. The correct decomposition of SnSO4 does not produce SO3.

### Final Answer
The chemical reaction that contains incorrect products is:
\[ \text{SnSO}_4 \xrightarrow{\text{heat}} \text{SnO}_2 + \text{SO}_3 + \text{SO}_2 \]