Which compound shows hydrogen bonding ?
Correct answer: D. C2H5OH
- A. C2H6
- B. C2H5Cl
- C. CH3OCH3
- D. C2H5OH
Explanation
Ethanol, C2H5OH, forms hydrogen bonds because its O-H group contains hydrogen bonded to highly electronegative oxygen, and oxygen has lone pairs that attract neighbouring hydrogen atoms. Ethane, ethyl chloride, and dimethyl ether lack an O-H or N-H bond needed for the strong hydrogen bonding expected in this question. Students may choose dimethyl ether because it contains oxygen, but it has no hydrogen directly bonded to oxygen.
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About Hydrogen Bonding
Hydrogen bonding is the strong attraction between hydrogen attached to nitrogen, oxygen or fluorine and an electronegative atom in the same or another molecule. It explains unusual boiling points, viscosity, surface tension, water's properties and the difference between intermolecular and intramolecular hydrogen bonding.
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