`Pb+Dil.HNO_(3) overset(Warm)toP+Quarr+H_(2)O`
Incorrect statement for Q is:

Options

A. Paramagnetic colourless gas
B. It is oxidized to paramagnetic coloured gas by air
C. It combines with `Fe_(2)(SO_(4))_(3)`
D. It is also obtained by disproportionation of `HNO_(2)`

Explanation

To solve the question regarding the reaction of lead (Pb) with dilute nitric acid (HNO₃), we need to analyze the given statements about the products formed during the reaction. The reaction can be summarized as follows:

1. **Identify the Reaction**:
The reaction between lead (Pb) and dilute nitric acid (HNO₃) when warmed produces lead(II) nitrate (Pb(NO₃)₂), nitrogen monoxide (NO), and water (H₂O). The balanced equation for this reaction is:
\[ \text{Pb} + 4 \text{HNO}_3 \rightarrow \text{Pb(NO}_3\text{)}_2 + 2 \text{NO} + 2 \text{H}_2\text{O} \]

2. **Identify the Products**:
In this reaction, the products are:
- Pb(NO₃)₂ (lead(II) nitrate)
- NO (nitrogen monoxide, which is gas Q)
- H₂O (water)

3. **Analyze the Statements**:
We need to evaluate the statements given in the question to find the incorrect one.

- **Statement A**: "NO is paramagnetic in nature and colorless gas."
- This statement is **true** because nitrogen monoxide (NO) has an unpaired electron, making it paramagnetic, and it is indeed colorless.

- **Statement B**: "NO is oxidized to paramagnetic colored gas by air."
- This statement is also **true**. When NO is oxidized, it forms nitrogen dioxide (NO₂), which is a reddish-brown gas, and NO₂ is paramagnetic as well.

- **Statement C**: "NO combines with Fe₂(SO₄)₃."
- This statement is **incorrect**. NO does not react with iron(III) sulfate (Fe₂(SO₄)₃) to form any significant products. Instead, NO can react with FeSO₄ (iron(II) sulfate) to form iron(III) oxide and other products, but not with Fe₂(SO₄)₃ directly.

- **Statement D**: "NO is obtained by the depropagation of HNO₂."
- This statement is **true**. Nitrous acid (HNO₂) can decompose to produce NO and HNO₃.

4. **Conclusion**:
The incorrect statement among the options is **C**, as NO does not combine with Fe₂(SO₄)₃.

### Final Answer:
The incorrect statement for Q is: **C. NO combines with Fe₂(SO₄)₃.**