Statement-1: Tritium is radioactive form of hydrogen.
statement-2: NaCl is more soluble in water as compared to `D_(2)O`.
Statement-3: pH of water depends on temperature.

Options

A. TTT
B. TTF
C. TFF
D. FFF

Answer

To analyze the statements provided in the question, we will evaluate each statement one by one and determine their validity.

### Step 1: Evaluate Statement 1
**Statement 1:** Tritium is a radioactive form of hydrogen.

- **Explanation:** Hydrogen has three isotopes:
- Protium (¹H, 0 neutrons)
- Deuterium (²H, 1 neutron)
- Tritium (³H, 2 neutrons)

Tritium is indeed radioactive because it has two neutrons in its nucleus, which makes it unstable. It undergoes beta decay, emitting low-energy beta particles. Therefore, this statement is **true**.

### Step 2: Evaluate Statement 2
**Statement 2:** NaCl is more soluble in water as compared to D₂O.

- **Explanation:** The solubility of ionic compounds like NaCl in solvents depends on the solvent's dielectric constant. Water (H₂O) has a higher dielectric constant than heavy water (D₂O). A higher dielectric constant indicates greater polarity, which enhances the solvation of ions. Therefore, NaCl is more soluble in water than in D₂O. Thus, this statement is **true**.

### Step 3: Evaluate Statement 3
**Statement 3:** The pH of water depends on temperature.

- **Explanation:** The pH of pure water is 7 at 25°C, but it changes with temperature. As the temperature increases, the pH of water decreases. For example, at 100°C, the pH of water is around 6.14. This change does not indicate that water becomes acidic; rather, it reflects the temperature dependence of the ionization of water. Therefore, this statement is also **true**.

### Conclusion
All three statements are true. Thus, the correct option is that all statements are true.

### Final Answer:
All statements are true.

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