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Which property of water is due to hydrogen bonding?
AIt is a gas at room temperature
BIts unusually high boiling point
CIt is colourless
DIt does not dissolve salt
Answer & Solution
Correct answer: A. It is a gas at room temperature
1. Most molecules of similar mass (e.g. H2S) are gases at room temperature.
2. Water needs much more energy to boil due to hydrogen bonds.
3. Each molecule pulls on several neighbours via H-bonds.
4. So water has an unusually high boiling point of 100 C.
5. Hydrogen bonding also explains ice density anomaly and high heat of vaporisation.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 2 'Chemical Bonding'_
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