GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Water has an unusually high boiling point for a molecular compound because it has
A
hydrogen bonding
B
ion-ion attractions
C
a high density
D
a large gram formula mass
Explanation: 

Detailed explanation-1: -Water has a high boiling point because its molecules are bound together by hydrogen bonding, which is a very strong intermolecular force. It takes more kinetic energy, or a higher temperature, to break the hydrogen bonding between water molecules, thus allowing them to escape as steam.

Detailed explanation-2: -Because hydrogen bonds are rather strong intermolecular interactions, breaking them requires a great deal of energy. This is why water has a high boiling point: breaking the intermolecular interactions that hold water molecules together requires a lot of heat (energy).

Detailed explanation-3: -Because of strong O⋅⋅⋅H hydrogen bonding between water molecules, water has an unusually high boiling point, and ice has an open, cagelike structure that is less dense than liquid water.

Detailed explanation-4: -So despite its small molecular weight, water has an incredibly big boiling point. This is because water requires more energy to break its hydrogen bonds before it can then begin to boil.

Detailed explanation-5: -Answer and Explanation: Hydrogen bonding raises both the melting point and the boiling point of a substance. This is because hydrogen bonds are strong intermolecular attractive forces that create stable molecules. It takes more energy to break up such a molecule than it would if the bond were not there.

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