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A molecule of a liquid which reaches the surface from interior gains energy because

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Important Questions on Properties of Solid and Liquid

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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 38
The radii of two soap bubbles are r1 and r2. In isothermal conditions, two meet together in a vacuum. Then the radius of the resultant bubble is given by:
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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 39
Energy needed in breaking a drop of radius R into n identical drops of radii r is given by
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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 40

A thread is tied slightly loose to a wire frame as in the figure and the frame is dipped into a soap solution and taken out. The frame is completely covered with the film. When the portion A is punctured with a pin, the thread

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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 41
Two parallel glass plates are dipped partly in the liquid of density d, keeping them vertical. If the distance between the plates is x, surface tension for liquid is T and the angle of contact is θ,  then the rise of liquid between the plates, due to capillary, will be
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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 42

The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now, the sliding wire is moved out so that the surface area increases. The radius of the circle formed by elastic thread will,

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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 43
Meniscus of mercury in capillary is _____.
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JEE Main
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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 44

A 20cm long capillary tube is dipped vertically in water and the liquid rises upto 10cm. If the entire system is kept in a freely falling platform, the length of water column in the tube will be 

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Physics Crash Course JEE Main>Chapter 7 - Properties of Solid and Liquid>Level 1>Q 45
A massless metal plate is placed on a horizontal tabletop lubricated with oil. The sheet is a square of side length ℓ=1.0 m and the oil layer has thickness h=1.0 mm. Initially one edge of the sheet coincides with one edge of the table. The sheet is pulled outwards without rotation with a constant force F=15 N. If coefficient of viscosity of the oil is η=0.2 N-s/m2, how long (in second) will it take to pull half of the sheet out of the table?