Multiple Choice
Which statement best describes the charge distribution and polarity of a CH_4 molecule?
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13. Liquids, Solids & Intermolecular Forces
Molecular Polarity
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Which phrase best describes a molecule of CH_4 in terms of molecular polarity and distribution of charge?
A
Nonpolar molecule with a symmetrical distribution of charge
B
Nonpolar molecule with an asymmetrical distribution of charge
C
Polar molecule with a symmetrical distribution of charge
D
Polar molecule with an asymmetrical distribution of charge
Verified step by step guidance1
Identify the molecular geometry of CH\_4 (methane). Since carbon forms four single bonds with hydrogen atoms, the shape is tetrahedral.
Recall that in a tetrahedral molecule with identical surrounding atoms, the bond dipoles cancel out due to symmetry.
Understand that the C-H bonds are slightly polar because of the difference in electronegativity between carbon and hydrogen, but the symmetrical arrangement causes the dipoles to cancel.
Conclude that the overall molecule has no net dipole moment, making it nonpolar.
Therefore, the best description is a nonpolar molecule with a symmetrical distribution of charge.
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