Ncert Exercises & Solutions

Increase in kinetic energy can overcome intermolecular forces of attraction. How will increase in temperature effect the viscosity of liquid-

1. Increase

2. No effect

3. Decrease

4. No regular pattern will be followed

Hint: An increase in temperature decreases the resistance to flow

With the increase in temperature, the kinetic energy of the molecules of liquid increases which can overcome the intermolecular forces. Hence, the liquid starts flowing.

In other words, the viscosity of a liquid decreases with an increase in temperature. It has been found that the decrease is about 2% per degree rise in temperature

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