`{:("Element","Electronegative value"),(W,2.7),(X,2.1),(Y,0.8),(Z,3.4):}`
Incorrect statement reagarding given information is:

Options

A. WZ does not conduct electricity in solid and fused state
B. YZ conducts electricity in solid and fused state
C. XZ conducts electricity only in solution state
D. WX conducts electricity only in fused state

Answer

To determine the incorrect statement regarding the electronegative values of elements W, X, Y, and Z, we will analyze the electronegativity differences between the pairs of elements and classify the type of bond formed based on these differences.

### Step-by-Step Solution:

1. **Identify Electronegativity Values**:
- W: 2.7
- X: 2.1
- Y: 0.8
- Z: 3.4

2. **Calculate Electronegativity Differences**:
- For W and Z:
\[ |2.7 - 3.4| = 0.7 \]
- For Y and Z:
\[ |0.8 - 3.4| = 2.6 \]
- For X and Z:
\[ |2.1 - 3.4| = 1.3 \]
- For W and X:
\[ |2.7 - 2.1| = 0.6 \]

3. **Classify the Type of Bond**:
- **W and Z**:
- Difference = 0.7 (Polar covalent)
- **Y and Z**:
- Difference = 2.6 (Ionic)
- **X and Z**:
- Difference = 1.3 (Polar covalent)
- **W and X**:
- Difference = 0.6 (Polar covalent)

4. **Analyze Conductivity**:
- **W and Z**: Polar covalent compounds do not conduct electricity in solid or fused states.
- **Y and Z**: Ionic compounds conduct electricity in all states (solid, fused, and solution).
- **X and Z**: Polar covalent compounds do not conduct electricity in solid or fused states.
- **W and X**: Polar covalent compounds do not conduct electricity in solid or fused states.

5. **Identify Incorrect Statement**:
- The statement "WZ does not conduct electricity in solid and fused state" is correct.
- The statement "YZ conducts electricity in solid and fused state" is correct.
- The statement "XZ conducts electricity only in solution state" is correct.
- The statement "WX conducts electricity only in fused state" is incorrect because WX, being a polar covalent compound, does not conduct electricity in solid or fused states.

### Conclusion:
The incorrect statement is: **"WX conducts electricity only in fused state."**

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