We have three beakers A , B and C containing glycerine, water and kerosene respectively. They are stirred vigorously and placed on a table. The liquid which comes to rest at the earliest is

Options

A. glycerin
B. water
C. kerosene
D. all of them at the same

Answer

To solve the problem, we need to analyze the behavior of the three liquids (glycerine, water, and kerosene) when they are stirred and then left to come to rest. The key concept involved in this scenario is viscosity.

### Step-by-Step Solution:

1. **Understanding Viscosity**:
- Viscosity is a measure of a fluid's resistance to flow. It is determined by the intermolecular forces between the molecules of the liquid. Higher viscosity means that the liquid has stronger intermolecular forces and flows less easily.

2. **Comparing the Viscosity of the Liquids**:
- **Glycerine**: Glycerine has a high viscosity due to strong intermolecular forces, which means it resists flow and will take longer to stop moving once stirred.
- **Water**: Water has a moderate viscosity, which is lower than that of glycerine but higher than kerosene.
- **Kerosene**: Kerosene has a low viscosity, meaning it has weak intermolecular forces and flows easily.

3. **Effect of Stirring**:
- When the liquids are stirred, the molecules gain kinetic energy and move around. Once the stirring stops, the liquids will start to come to rest due to the effects of viscosity.

4. **Determining Which Liquid Comes to Rest First**:
- Since glycerine has the highest viscosity, it will experience the strongest resistance to flow and will come to rest the quickest after stirring.
- Water, being less viscous than glycerine, will come to rest after glycerine but before kerosene.
- Kerosene, with the lowest viscosity, will continue to flow for a longer time before coming to rest.

5. **Conclusion**:
- Based on the analysis of viscosity, the liquid that comes to rest at the earliest is **glycerine**.

### Final Answer:
The liquid which comes to rest at the earliest is **glycerine**.

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