NURSING EXAM QUESTIONS
PHARMACEUTICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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it decreases
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it increases
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it remains the same
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None of the above
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Detailed explanation-1: -An increase in temperature increases the kinetic energy of the molecules, and the effectiveness of intermolecular attraction decreases. So the surface tension decreases as the temperature is raised.
Detailed explanation-2: -As temperature decreases, surface tension increases. Conversely, as surface tension decreases strong; as molecules become more active with an increase in temperature becoming zero at its boiling point and vanishing at critical temperature. Adding chemicals to a liquid will change its surface tension characteristics.
Detailed explanation-3: -Surface tension of a liquid is a property due to intermolecular forces. So, it cannot change until intermolecular force changes. Hence, surface tension does not depend on area. With increase in temperature, intermolecular force and hence surface tension decreases.