GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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viscosity
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heat of vaporization
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surface tension
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boiling point
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Detailed explanation-1: -Cohesive forces between molecules cause the surface of a liquid to contract to the smallest possible surface area. This general effect is called surface tension. Molecules on the surface are pulled inward by cohesive forces, reducing the surface area.
Detailed explanation-2: -Surface Tension: “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules."
Detailed explanation-3: -Diethyl ether has the least surface tension as it has highest vapour pressure.
Detailed explanation-4: -1. Note the correlation between the surface tension of a liquid and the strength of the intermolecular forces: the stronger the intermolecular forces, the higher the surface tension.