Identify `(A) + N_(2) overset(Delta) rarr (B) overset(H_(2) O) rarr underset("White ppt.") ((C)darr) (D)_((g))` White precipitate `( C)` dissolves is `NaOH` solution the gas `(D)` gives white fumes with `HCl`.

Options

A. B
B. AI
C. GA
D. C

Explanation

To solve the problem, we will identify the compounds (A), (B), (C), and (D) step by step based on the given reactions and information.

### Step 1: Identify Compound (A)
The problem states that (A) reacts with nitrogen gas (N₂) when heated. A common metal that reacts with nitrogen to form a nitride is aluminum.

**Solution:**
(A) = Aluminum (Al)

**Hint:** Think about metals that can form nitrides when heated with nitrogen.

### Step 2: Identify Compound (B)
When aluminum (A) reacts with nitrogen (N₂), it forms aluminum nitride. The reaction can be represented as:
\[ 4Al + N_2 \rightarrow 2Al_3N_3 \]
Thus, (B) is aluminum nitride.

**Solution:**
(B) = Aluminum nitride (Al₃N₃)

**Hint:** Look for the product of a metal reacting with nitrogen; nitrides are common products.

### Step 3: Identify Compound (C)
The problem states that (B) undergoes hydrolysis to produce (C), which is described as a white precipitate. When aluminum nitride reacts with water, it produces aluminum hydroxide and ammonia:
\[ Al_3N_3 + 6H_2O \rightarrow 3Al(OH)_3 + 3NH_3 \]
Aluminum hydroxide (Al(OH)₃) is the white precipitate.

**Solution:**
(C) = Aluminum hydroxide (Al(OH)₃)

**Hint:** Consider the products of hydrolysis of metal nitrides, especially those that yield hydroxides.

### Step 4: Identify Compound (D)
The white precipitate (C) dissolves in sodium hydroxide (NaOH) solution, forming sodium aluminate:
\[ Al(OH)_3 + NaOH \rightarrow NaAl(OH)_4 \]
The gas (D) produced during hydrolysis is ammonia (NH₃), which is released when aluminum nitride reacts with water.

**Solution:**
(D) = Ammonia (NH₃)

**Hint:** Think about gases produced during the hydrolysis of metal nitrides, especially those that are basic.

### Final Summary
- (A) = Aluminum (Al)
- (B) = Aluminum nitride (Al₃N₃)
- (C) = Aluminum hydroxide (Al(OH)₃) - white precipitate
- (D) = Ammonia (NH₃) - gas that gives white fumes with HCl

### Overall Answer
(A) is Aluminum, (B) is Aluminum nitride, (C) is Aluminum hydroxide, and (D) is Ammonia.