Calcium imide on hydrolysis will give gas `(B)` which on oxidation by beaching powder gives gas `(C)` gas `(C)` on reaction with magnesium give compound `(D)`. `(D)` on hydrolysis gives gas `(B)`. `(B), (C)` and `(D)` are

Options

A. `NH_(3),N_(2),Mg_(3)N_(2)`
B. `N_(2),NH_(3),MgNH`
C. `N_(2),N_(2)O_(5),Mg(NO_(3))_(2)`
D. `NH_(3),NO_(2),Mg(NO_(2))_(2)`

Answer

To solve the question step by step, we will identify the gases and compounds involved in the reactions described.

### Step 1: Hydrolysis of Calcium Imide
- **Calcium imide** is represented as \( \text{CaNH} \).
- Upon hydrolysis, calcium imide reacts with water to produce calcium oxide and ammonia gas.
- The reaction can be written as:
\[ \text{CaNH} + \text{H}_2\text{O} \rightarrow \text{CaO} + \text{NH}_3 \]
- Therefore, the gas \( B \) produced in this reaction is **ammonia (NH₃)**.

### Step 2: Oxidation of Gas B by Bleaching Powder
- Gas \( B \) (ammonia) is then oxidized by **bleaching powder** (which contains calcium hypochlorite, \( \text{Ca(OCl)₂} \)).
- The reaction produces nitrogen gas and calcium chloride precipitate along with water:
\[ 2 \text{NH}_3 + \text{Ca(OCl)₂} \rightarrow \text{CaCl}_2 + \text{N}_2 + 2 \text{H}_2\text{O} \]
- Thus, the gas \( C \) produced in this reaction is **nitrogen (N₂)**.

### Step 3: Reaction of Gas C with Magnesium
- Gas \( C \) (nitrogen) reacts with **magnesium** to form magnesium nitride.
- The reaction can be represented as:
\[ N_2 + 3 \text{Mg} \rightarrow \text{Mg}_3\text{N}_2 \]
- Therefore, the compound \( D \) formed in this reaction is **magnesium nitride (Mg₃N₂)**.

### Step 4: Hydrolysis of Compound D
- When magnesium nitride \( D \) undergoes hydrolysis, it produces ammonia gas again:
\[ \text{Mg}_3\text{N}_2 + 6 \text{H}_2\text{O} \rightarrow 3 \text{Mg(OH)}_2 + 2 \text{NH}_3 \]
- This confirms that upon hydrolysis of \( D \), we regenerate gas \( B \), which is **ammonia (NH₃)**.

### Summary of Results
- Gas \( B \): **Ammonia (NH₃)**
- Gas \( C \): **Nitrogen (N₂)**
- Compound \( D \): **Magnesium Nitride (Mg₃N₂)**

### Final Answer
Thus, the gases and compound are:
- \( B \) = Ammonia (NH₃)
- \( C \) = Nitrogen (N₂)
- \( D \) = Magnesium Nitride (Mg₃N₂)