Choose the correct statement(s) among the following.

Options

A. `SnCl_(2).2H_(2)O` is reducing agent.
B. `SnO_(2)` reacts with `KOH` to form `K_(2)[Sn(OH)_(6)]`.
C. A solution of `PbCl_(2)` in `HCl` contains `Pb^(2+) and Cl^(-)` ions.
D. The reaction of `Pb_(3)O_(4)` with hot dilute nitric acid to give `PbO_(2)` is a redox reaction.

Explanation

To solve the problem of choosing the correct statements among the given options, we will analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement 1:** SnCl2 is a reducing agent.

- **Explanation:** SnCl2 can be oxidized to Sn4+ while reducing another species. Therefore, it acts as a good reducing agent.
- **Conclusion:** This statement is **correct**.

### Step 2: Analyze the second statement
**Statement 2:** SnO2 reacts with KOH to form K2SnOS6.

- **Explanation:** SnO2 is an amphoteric oxide and can react with bases like KOH to form complex ions. The reaction leads to the formation of a complex compound.
- **Conclusion:** This statement is **correct**.

### Step 3: Analyze the third statement
**Statement 3:** A solution of PbCl2 in HCl contains PbCl2+ and Cl-.

- **Explanation:** PbCl2 can form complex ions in the presence of HCl, such as PbCl4^2-. This means that it does not exist simply as Pb2+ and Cl- in solution due to complex formation.
- **Conclusion:** This statement is **incorrect**.

### Step 4: Analyze the fourth statement
**Statement 4:** The reaction of Pb3O4 with hot dilute nitric acid is a redox reaction.

- **Explanation:** When Pb3O4 reacts with dilute nitric acid, it primarily undergoes acid-base reactions rather than a redox reaction. The products do not involve a change in oxidation states.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion
The correct statements are:
- Statement 1: SnCl2 is a reducing agent (Correct)
- Statement 2: SnO2 reacts with KOH to form K2SnOS6 (Correct)
- Statement 3: A solution of PbCl2 in HCl contains PbCl2+ and Cl- (Incorrect)
- Statement 4: The reaction of Pb3O4 with hot dilute nitric acid is a redox reaction (Incorrect)

Thus, the correct options are **A and B**.

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