Cl2O is polar molecules because polar bonds are arranged asymmetrically around the central atom in a bent shape as there are two lone pairs of electrons on the central atom So, Unet not equal to zero. Hence , it is polar molecules...

So, here correct answer is "Cl2O"...

$$Hope it's help... $$

Introduction:
In order to determine which molecule does not have both polar and nonpolar bonds, we need to understand the concept of polarity and nonpolarity in chemical bonding. Polarity is a property of a molecule that arises from the presence of polar bonds and the geometry of the molecule. A polar bond is a covalent bond in which the electrons are unequally shared between the atoms, resulting in a partial positive charge on one atom and a partial negative charge on the other. Nonpolar bonds, on the other hand, are covalent bonds in which the electrons are equally shared between the atoms, resulting in no separation of charge.

Explanation:
To determine the polarity of a molecule, we need to consider both the polarity of the individual bonds and the molecular geometry. If a molecule contains only polar bonds but has a symmetric geometry, the partial charges on the individual bonds cancel out, resulting in a nonpolar molecule. Conversely, if a molecule contains polar bonds and has an asymmetric geometry, the molecule will be polar overall.

Let's analyze each molecule mentioned in the options to determine their polarity:

1. H2O2 (Hydrogen Peroxide):
Hydrogen peroxide contains two polar O-H bonds. The oxygen atom is more electronegative than the hydrogen atoms, resulting in a partial negative charge on the oxygen and partial positive charges on the hydrogens. Additionally, the molecule has a bent geometry, which is asymmetric. Therefore, hydrogen peroxide is a polar molecule.

2. Cl2O (Dichlorine Monoxide):
Dichlorine monoxide contains two polar Cl-O bonds. The oxygen atom is more electronegative than the chlorine atoms, resulting in a partial negative charge on the oxygen and partial positive charges on the chlorines. However, the molecule has a linear geometry, which is symmetric. Therefore, the partial charges on the individual bonds cancel out, making Cl2O a nonpolar molecule.

3. S2Cl2 (Disulfur Dichloride):
Disulfur dichloride contains two polar S-Cl bonds. The chlorine atoms are more electronegative than the sulfur atoms, resulting in partial negative charges on the chlorines and partial positive charges on the sulfurs. However, the molecule has a bent geometry, which is asymmetric. Therefore, disulfur dichloride is a polar molecule.

4. P2H4 (Diphosphorus Tetrahydride):
Diphosphorus tetrahydride contains two polar P-H bonds. The hydrogen atoms are more electronegative than the phosphorus atoms, resulting in partial negative charges on the hydrogens and partial positive charges on the phosphorus atoms. Additionally, the molecule has a linear geometry, which is symmetric. Therefore, the partial charges on the individual bonds cancel out, making P2H4 a nonpolar molecule.

Conclusion:
Among the given options, the molecule that does not have both polar and nonpolar bonds is Cl2O (Dichlorine Monoxide). The molecule has two polar Cl-O bonds, but its linear geometry cancels out the partial charges on the individual bonds, resulting in a nonpolar molecule.