Statement-1 : Liquid `NH_(3)` is used for refrigeration.
Statement-2 : Enthalpy of vapourisation of ammonia is very large.

Options

A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1
B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
C. Statement-1 is True, Statement-2 is False.
D. Statement-1 is False, Statement-2 is True.

Answer

To analyze the statements provided in the question, we will break down the reasoning step by step.

### Step-by-Step Solution:

**Step 1: Understanding the Statements**
- **Statement-1:** Liquid NH₃ (ammonia) is used for refrigeration.
- **Statement-2:** The enthalpy of vaporization of ammonia is very large.

**Step 2: Analyzing Statement-1**
- Ammonia is indeed used in refrigeration systems. This is primarily due to its thermodynamic properties, which allow it to absorb heat effectively during the phase change from liquid to gas.

**Hint for Step 2:** Consider the properties of refrigerants and why certain substances are chosen based on their physical characteristics.

**Step 3: Analyzing Statement-2**
- The enthalpy of vaporization refers to the amount of energy required to convert a unit mass of a liquid into vapor without a change in temperature. Ammonia has a high enthalpy of vaporization due to the presence of hydrogen bonding between its molecules.

**Hint for Step 3:** Recall how hydrogen bonding affects the physical properties of substances, particularly boiling points and enthalpy of vaporization.

**Step 4: Relating Both Statements**
- The high enthalpy of vaporization means that ammonia can absorb a significant amount of heat when it evaporates, making it an effective refrigerant. This is why both statements are true and related: the large enthalpy of vaporization contributes to its effectiveness in refrigeration.

**Hint for Step 4:** Think about how the energy absorption during phase changes is crucial for refrigeration processes.

**Step 5: Conclusion**
- Both statements are true. Liquid ammonia is used for refrigeration because it has a high enthalpy of vaporization, which allows it to absorb heat efficiently during evaporation.

**Final Answer:** Both Statement-1 and Statement-2 are true.