Which contains both polar and non-polar bonds ? .

Options

A. `Nh_4Cl`
B. HCN
C. `H_2O_2`
D. `CH_4`

Answer

To determine which compound contains both polar and non-polar bonds, we can analyze the bonds in each of the given compounds.

### Step-by-Step Solution:

1. **Understanding Polar and Non-Polar Bonds**:
- Polar bonds 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 occur when the electronegativity difference between the two atoms is negligible, resulting in an even distribution of electron density.

2. **Analyzing NH4Cl (Ammonium Chloride)**:
- In NH4Cl, the bonds between nitrogen (N) and hydrogen (H) are polar due to the difference in electronegativity. The bond between nitrogen and chlorine (Cl) is also polar.
- **Conclusion**: All bonds in NH4Cl are polar.

3. **Analyzing HCN (Hydrogen Cyanide)**:
- In HCN, the bond between hydrogen (H) and carbon (C) is polar, and the bond between carbon (C) and nitrogen (N) is also polar due to the difference in electronegativity.
- **Conclusion**: All bonds in HCN are polar.

4. **Analyzing H2O2 (Hydrogen Peroxide)**:
- In H2O2, the O-H bonds are polar due to the electronegativity difference between oxygen and hydrogen.
- The O-O bond, however, is non-polar because it is a bond between two identical atoms (oxygen).
- **Conclusion**: H2O2 contains both polar (O-H) and non-polar (O-O) bonds.

5. **Analyzing CH4 (Methane)**:
- In CH4, all four C-H bonds are considered non-polar because the electronegativity difference between carbon and hydrogen is very small.
- **Conclusion**: All bonds in CH4 are non-polar.

6. **Final Conclusion**:
- Among the compounds analyzed, only H2O2 contains both polar and non-polar bonds. Therefore, the correct answer is H2O2.

### Answer:
The compound that contains both polar and non-polar bonds is **H2O2 (Hydrogen Peroxide)**.