84.
Match the columns.
Column I Column II
a. Viscosity 1. Oil rises in the narrow long tube
b. Capillarity 2. tendancy to contract
c. Surface tension 3. Attractive between molecules of same substances
d. Cohesive force 4. Fluid friction

85.
A body is floating in a liquid partly immersed. The body and the liquid are taken to moon. The body

88.
Assertion (A): When a ship enters a sea from a river, it rises a little.
Reason (R): The density of sea water is greater than that of river water.
In the context of the above statements, which of the following is true?

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