Statement-1: Conc. Solution of Li in `NH_(3)` is diamagnetic.
Statement-2: `Mg//NH_3` works as anti-hydrogenation agent.
Statement-3: LiCl forms `LiCl.2H_(2)O`.

Options

A. TFT
B. FTF
C. TTT
D. FFF

Answer

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

### Step-by-Step Solution:

**Statement 1: Concentrated solution of Li in NH₃ is diamagnetic.**

1. **Understanding the Behavior of Alkali Metals in Liquid Ammonia:**
- When alkali metals (like lithium) are dissolved in liquid ammonia, they form a deep blue solution. This blue color is due to the formation of solvated electrons.
- The solution is initially paramagnetic due to the presence of unpaired electrons.

2. **Change in Magnetic Properties:**
- As the reaction proceeds, hydrogen gas is evolved, and the solution changes color from blue to brown.
- This change indicates that the solution becomes diamagnetic as the unpaired electrons are removed.

3. **Conclusion:**
- Therefore, the first statement is **true**: a concentrated solution of Li in NH₃ is indeed diamagnetic.

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**Statement 2: Mg//NH₃ works as an anti-hydrogenation agent.**

1. **Understanding Magnesium in Ammonia:**
- Magnesium, when reacted with ammonia, acts as a reducing agent.
- It is commonly known to facilitate hydrogenation reactions, particularly in the Birch reduction process.

2. **Clarifying the Terminology:**
- The term "anti-hydrogenation" suggests that it would prevent hydrogenation, which is incorrect.
- Instead, magnesium promotes hydrogenation, making the second statement **false**.

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**Statement 3: LiCl forms LiCl.2H₂O.**

1. **Understanding Lithium Chloride Hydration:**
- Lithium chloride (LiCl) is known to crystallize with water molecules.
- When LiCl is dissolved in water, it forms hydrated crystals, specifically LiCl·2H₂O.

2. **Conclusion:**
- Therefore, the third statement is **true**: LiCl does indeed form LiCl·2H₂O.

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### Final Evaluation of Statements:
- **Statement 1:** True
- **Statement 2:** False
- **Statement 3:** True

### Answer:
The correct option based on the evaluation of the statements is that the first statement is true, the second is false, and the third is true.

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