`4BCl_(3)+ 3LiAIH_(4) to A+ 3AlCl_(3)+3 LiCl`
When `A` reacts with `NaOH` it produces a colourless combustible gas and another compound 'B'. Select incorrect statement about 'B'

Options

A. (1) It aqueous solution turns red litmus blue
B. It shows anionic hydrolysis
C. It shows cationic hydrolysis
D. It can also produce by reaction of boron with NaOH

Explanation

To solve the question, we need to follow these steps:

### Step 1: Identify Compound A
The reaction given is:
\[ 4BCl_3 + 3LiAlH_4 \rightarrow A + 3AlCl_3 + 3LiCl \]

Here, \( A \) is formed when boron trichloride reacts with lithium aluminum hydride. The product of this reaction is diborane (\( B_2H_6 \)).

So, we can write:
\[ A = B_2H_6 \]

### Step 2: Determine the Reaction of A with NaOH
Next, we need to analyze the reaction of \( A \) (diborane) with sodium hydroxide (\( NaOH \)):
\[ B_2H_6 + NaOH \rightarrow B + \text{(colorless combustible gas)} \]

When diborane reacts with sodium hydroxide, it produces sodium borate (\( Na_3BO_3 \)) and hydrogen gas (\( H_2 \)), which is the colorless combustible gas.

### Step 3: Identify Compound B
From the reaction, we can conclude:
\[ B = Na_3BO_3 \]

### Step 4: Analyze the Properties of Compound B
Now, we need to evaluate the statements regarding \( B \) (sodium borate, \( Na_3BO_3 \)) to find the incorrect one.

1. **Statement 1**: "Its aqua solution turns red litmus blue."
- This is correct because sodium borate is a basic salt and will turn red litmus paper blue.

2. **Statement 2**: "It shows anionic hydrolysis."
- This is also correct. Sodium borate undergoes anionic hydrolysis because it is a salt of a strong base (NaOH) and a weak acid (Boric acid).

3. **Statement 3**: "It shows cationic hydrolysis."
- This statement is incorrect. Cationic hydrolysis occurs in salts formed from strong acids and weak bases, which is not the case here.

4. **Statement 4**: "It can also be produced by the reaction of boron with NaOH."
- This is correct. Sodium borate can indeed be formed from the reaction of boron with sodium hydroxide.

### Conclusion
The incorrect statement about compound \( B \) (sodium borate) is:
**"It shows cationic hydrolysis."**