Why is the water molecule polar?

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(B) Oxygen is more electronegative than hydrogen,which creates a polar $O-H$ bond. In a water molecule,there are two such polar $O-H$ bonds. These bon

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Due to the difference in electronegativity between oxygen and hydrogen atoms and its bent geometry.

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(B) Oxygen is more electronegative than hydrogen,which creates a polar $O-H$ bond. In a water molecule,there are two such polar $O-H$ bonds. These bonds are arranged at a bond angle of $104.5^{\circ}$ due to the presence of two lone pairs on the oxygen atom. Because of this bent geometry,the bond dipoles do not cancel each other out,resulting in a net dipole moment of $1.84 \ D$. Therefore,the water molecule is polar.

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