Increase in temperature, in general results in the____________________?
Correct answer: D. Decrease in the viscosity of liquids and increase in that of gases
- A. Decrease in the viscosities of both liquids & gases
- B. Increase in the viscosities of both liquids & gases
- C. Increase in the viscosity of liquids and decrease in that of gases
- D. Decrease in the viscosity of liquids and increase in that of gases
Explanation
Heating reduces intermolecular cohesion in liquids, so their viscosity decreases, while it increases molecular momentum transfer in gases, so gas viscosity increases. Therefore, option d describes the general trend.
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