Assertion : NH3 is liquidities more easily than `CO_(2)`.
Reason : Critical temperature of NH3 is more than `CO_(2)`.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is the currect explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

To solve the question, we need to analyze the assertion and reason provided.

**Assertion:** NH3 is liquefied more easily than CO2.

**Reason:** The critical temperature of NH3 is more than that of CO2.

### Step-by-Step Solution:

1. **Understanding Liquefaction:**
- Liquefaction refers to the process of a substance transitioning from a gas to a liquid state. The ease of liquefaction is influenced by intermolecular forces and the critical temperature of the substance.

2. **Defining Critical Temperature:**
- The critical temperature (T_c) of a substance is the temperature above which it cannot exist as a liquid, regardless of the pressure applied. A higher critical temperature indicates that a substance can be liquefied more easily.

3. **Comparing NH3 and CO2:**
- Ammonia (NH3) has strong hydrogen bonding due to the presence of nitrogen and hydrogen. This results in stronger intermolecular forces.
- Carbon dioxide (CO2), on the other hand, has weaker van der Waals forces and does not exhibit hydrogen bonding.

4. **Critical Temperatures:**
- The critical temperature of NH3 is approximately 132°C, while that of CO2 is around 31°C. Since the critical temperature of NH3 is higher than that of CO2, NH3 can be liquefied at higher temperatures and pressures compared to CO2.

5. **Conclusion:**
- Since NH3 has a higher critical temperature than CO2, it can be liquefied more easily. Therefore, both the assertion and reason are correct, and the reason correctly explains the assertion.

### Final Answer:
Both the assertion and reason are correct, and the reason is the correct explanation for the assertion.