QQuestionChemistry
QuestionChemistry
"Which of the following statements could be true regarding polar molecules? Choose one or more:
A. A polar molecule will not contain polar bonds.
B. A polar molecule may have one or more lone pairs.
C. A polar molecule has an uneven distribution of electron density.
D. The bond dipoles in a polar molecule will cancel.
E. A polar molecule will never contain nonpolar bonds."
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Understanding Polar Molecules
A polar molecule is characterized by an uneven distribution of electrical charge due to differences in electronegativity between atoms and the molecule's overall geometry.
Step 3:: Analyzing Statement A
\text{Statement A: A polar molecule will not contain polar bonds}
This is FALSE. Polar molecules are actually DEFINED by having polar bonds. Polar bonds occur when there is a significant difference in electronegativity between bonded atoms.
Step 4:: Analyzing Statement B
\text{Statement B: A polar molecule may have one or more lone pairs}
This is TRUE. Lone pairs of electrons can contribute to molecular polarity by creating an uneven electron distribution.
Step 5:: Analyzing Statement C
\text{Statement C: A polar molecule has an uneven distribution of electron density}
This is TRUE. Uneven electron density is the fundamental definition of a polar molecule.
Step 6:: Analyzing Statement D
\text{Statement D: The bond dipoles in a polar molecule will cancel}
This is FALSE. If bond dipoles canceled, the molecule would be nonpolar. In a polar molecule, bond dipoles do not completely cancel out.
Step 7:: Analyzing Statement E
\text{Statement E: A polar molecule will never contain nonpolar bonds}
This is FALSE. A polar molecule can contain some nonpolar bonds if the overall molecular geometry results in a net dipole moment.
Final Answer
A polar molecule may have lone pairs and will have an uneven distribution of electron density.
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