June 2018 NY Regents Chemistry Exam
14 Which statement describes the charge distribution and the polarity of a CH4 molecule?
(1) The charge distribution is symmetrical and the molecule is nonpolar.
(2) The charge distribution is asymmetrical and the molecule is nonpolar.
(3) The charge distribution is symmetrical and the molecule is polar.
(4) The charge distribution is asymmetrical and the molecule is polar.
Solution: CH4 is a symmetrical molecule and is therefore nonpolar. Assymetrical molecules are polar. The more common nonpolar molecules encountered on the Regents Chemistry exam are : CO2 and CH4. The most common polar molecules are H2O and NH3.
Answer:1
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