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Multiple Choice
Which of the following best describes the polarity of a water molecule?
A
Water is a nonpolar molecule because it has a symmetrical shape.
B
Water is a nonpolar molecule due to its linear shape.
C
Water is a polar molecule because of its bent shape and unequal distribution of electrons.
D
Water is a polar molecule because it has an equal distribution of electrons.
Verified step by step guidance
1
Understand the concept of molecular polarity: A molecule is polar if it has a net dipole moment, which occurs due to an unequal distribution of electrons between atoms in a molecule.
Examine the shape of the water molecule: Water (H₂O) has a bent shape due to the two lone pairs of electrons on the oxygen atom, which repel the hydrogen atoms.
Consider the electronegativity of atoms: Oxygen is more electronegative than hydrogen, meaning it attracts the shared electrons more strongly, creating a partial negative charge on the oxygen and partial positive charges on the hydrogens.
Analyze the distribution of electrons: The unequal sharing of electrons between oxygen and hydrogen atoms results in a net dipole moment, making water a polar molecule.
Conclude based on the analysis: The correct description of water's polarity is that it is a polar molecule due to its bent shape and unequal distribution of electrons, leading to a net dipole moment.