`{:("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 the elements W, X, Y, and Z, we will analyze each statement based on the given electronegativity values.

### Given Data:
- W: 2.7
- X: 2.1
- Y: 0.8
- Z: 3.4

### Step 1: Understand Electronegativity
Electronegativity is the tendency of an atom to attract shared electrons in a chemical bond. The Pauling scale is commonly used to measure electronegativity, ranging from 0.7 (least electronegative) to 4.0 (most electronegative).

### Step 2: Calculate the Electronegativity Differences
We will calculate the electronegativity differences (ΔEN) for each pair of elements mentioned in the statements.

1. **For W and Z:**
- ΔEN = |2.7 - 3.4| = 0.7
- Since 0.7 falls between 0.5 and 1.6, the bond is polar covalent. Polar covalent compounds conduct electricity in solution but not in solid or fused states.

2. **For Y and Z:**
- ΔEN = |0.8 - 3.4| = 2.6
- Since 2.6 is greater than 2, the bond is ionic. Ionic compounds conduct electricity in solid, fused, and solution states.

3. **For X and Z:**
- ΔEN = |2.1 - 3.4| = 1.3
- Since 1.3 falls between 0.5 and 1.6, the bond is polar covalent. Polar covalent compounds conduct electricity only in solution.

4. **For W and X:**
- ΔEN = |2.7 - 2.1| = 0.6
- Since 0.6 falls between 0.5 and 1.6, the bond is polar covalent. Polar covalent compounds conduct electricity only in solution.

### Step 3: Analyze Each Statement
Now let's analyze the statements based on our calculations:

1. **Statement 1:** WZ does not conduct electricity in solid and fused state.
- **Analysis:** Correct, as WZ is polar covalent.

2. **Statement 2:** YZ conducts electricity in solid and fused state.
- **Analysis:** Correct, as YZ is ionic.

3. **Statement 3:** XZ conducts electricity only in solution state.
- **Analysis:** Correct, as XZ is polar covalent.

4. **Statement 4:** WX conducts electricity only in fused state.
- **Analysis:** Incorrect, as WX is polar covalent and conducts electricity only in solution.

### Conclusion
The incorrect statement regarding the given information is:
**WX conducts electricity only in fused state.**