Molecule having non-pola as well as polar bonds but the molecule as a whole is polar:

Options

A. `(SCN)_(2)`
B. `Cl_(2)O_(8)`
C. `B_(2)Cl_(4)`
D. `I_(2)Cl_(6)`

Explanation

To solve the question of identifying a molecule that has both polar and non-polar bonds but is polar as a whole, we can follow these steps:

### Step 1: Understand the Definitions
- **Polar Bonds**: These occur when there is a significant difference in electronegativity between the two atoms involved in the bond, leading to a dipole moment.
- **Non-Polar Bonds**: These occur when the electronegativity difference is negligible, resulting in no dipole moment.
- **Polar Molecule**: A molecule that has an overall dipole moment due to the arrangement of its polar bonds.

### Step 2: Analyze the Given Options
The options provided are:
1. SCN (Thiocyanate ion)
2. Cl2O8 (Dichlorine octoxide)
3. B2Cl4 (Diborane tetrachloride)
4. I2Cl6 (Diiodine hexachloride)

### Step 3: Examine Each Option
1. **SCN (Thiocyanate ion)**:
- The structure can be represented as S-C≡N.
- The sulfur (S) has lone pairs and forms a bond with carbon (C), which is then triple-bonded to nitrogen (N).
- The molecule has polar bonds (C≡N) and non-polar characteristics due to the symmetry around the sulfur atom.
- The overall molecule is polar due to the dipole moment from the S to the C and N.

2. **Cl2O8 (Dichlorine octoxide)**:
- This molecule has a complex structure with multiple polar bonds.
- However, due to its symmetrical arrangement, it does not result in an overall dipole moment, making it non-polar.

3. **B2Cl4 (Diborane tetrachloride)**:
- This molecule has a planar structure with symmetrical arrangement of Cl atoms around B.
- The symmetry leads to cancellation of dipole moments, resulting in a non-polar molecule.

4. **I2Cl6 (Diiodine hexachloride)**:
- This molecule also has a symmetrical arrangement of Cl atoms around I.
- Similar to B2Cl4, the symmetry cancels out the dipole moments, making it non-polar.

### Step 4: Conclusion
From the analysis, **SCN** is the only molecule that has both polar and non-polar bonds and is polar as a whole.

### Final Answer
The molecule that has non-polar as well as polar bonds but is polar as a whole is **SCN (Thiocyanate ion)**.

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