In microwave ovens, the wave energy produced is absorbed by certain polar molecules.Which of the following would absorb microwave energy?
Correct answer: A. C2H5OH
- A. C2H5OH
- B. NaCl
- C. SiO2
- D. CH4
Explanation
A polar molecule has a net dipole moment and partial charges in the same molecule due to difference in electronegativity. Option A is correct because ethanol is indeed polar due to the O-H bond, where oxygen being more electronegative pulls the electrons in the shared pair and attains a partial negative charge while hydrogen being less electronegative has a partial positive charge.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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