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Question
Spray some mercury and some water on a glass surface. It will be observed that mercury forms _______ drops while water _______.
Spray some mercury and some water on a glass surface. It will be observed that mercury forms _______ drops while water _______.
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Solution
The correct option is B Spherical, spreads
The reason for the difference is that the force of cohesion between the molecules of mercury is more than the force of adhesion between the molecules of mercury and glass, whereas the force of cohesion between the molecules of water is less than the force of adhesion between the molecules of water and glass.
The reason for the difference is that the force of cohesion between the molecules of mercury is more than the force of adhesion between the molecules of mercury and glass, whereas the force of cohesion between the molecules of water is less than the force of adhesion between the molecules of water and glass.
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