Which of the following statements is incorrect ?

Options

A. Ammonium salts on reaction with strong alkalies produce a non`-` inflamable gas.
B. fac`- [Co(NO_(3))_(2)("dien")]` is non`-` chiral.
C. Solid potassium dichromate and concentrated `H_(2)SO_(4)` liberates chlorine gas with solid sodium chloride.
D. The increasing order of paramagnetic properties amongst `VCl_(3),VOSO_(4),Na_(3)VO_(4),[V(H_(2)O)_(6)]SO_(4).H_(2)O` is `Na_(3)VO_(4) lt VOSO_(4) lt VCl_(3) lt [V(H_(2)O)_(6)]SO_(4).H_(2)O.`

Explanation

To determine which statement is incorrect, we will analyze the provided options step by step.

### Step 1: Identify the Statements
We need to look at the statements provided in the question. Since the specific statements are not listed, we will focus on the one mentioned in the video transcript.

### Step 2: Analyze the Reaction
The video mentions the reaction between solid potassium dichromate (K₂Cr₂O₇) and concentrated sulfuric acid (H₂SO₄) with solid sodium chloride (NaCl).

The reaction can be represented as:
\[ 4 \text{NaCl} + \text{K}_2\text{Cr}_2\text{O}_7 + 6 \text{H}_2\text{SO}_4 \rightarrow 2 \text{KHSO}_4 + 2 \text{CrO}_2\text{Cl}_2 + 4 \text{NaHSO}_4 + 3 \text{H}_2\text{O} \]

### Step 3: Identify the Product
From the reaction, we can see that the products include chromyl chloride (CrO₂Cl₂), which is known to produce deep red vapors.

### Step 4: Conclusion
The statement that claims the reaction liberates chlorine gas (Cl₂) is incorrect. Instead, the reaction produces chromyl chloride gas, which is characterized by its deep red vapors.

### Final Answer
The incorrect statement is that solid potassium dichromate and concentrated sulfuric acid liberate chlorine gas with solid sodium chloride. Instead, they produce chromyl chloride gas.

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