Mechanical Properties of Fluids

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Question

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Question 1 : A number of small drops of mercury coalesce adiabatically to form a single drop. The temperature of drop
1. Is infinite
2. Increases
3. Remains unchanged
4. May decrease or increase depending upon size
Answer
8316

Question 2 : Surface tension of a soap solution is 1.9 × 10-2N/m. work done in blowing a bubble of 2.0 cm diameter will be
1. 7.6 × 10^-6 p J
2. 15.2 × 10^-6 p J
3. 1.9 × 10^-6 p J
4. 1 × 10^-4 p J
Answer
8317

Question 3 : Plants get water through the roots because of
1. Elasticity
2. Gravity
3. Viscosity
4. Capillarity
Answer
8318

Question 4 : Choose the wrong statement from the following.
1. Oil rises through the wick due to capillarity
2. Small droplets of a liquid are spherical due to surface tension
3. In drinking the cold drinks through a straw, we use the phenomenon of capillarity
4. Gum is used to stick two surfaces. In this process we use the property of Adhesion
Answer
8319

Question 5 : The height of a liquid in a fine capillary tube
1. Decreases with an increase in the surface tension
2. Increases with an increase in the density of a liquid
3. Decreases with a decrease in the diameter of the tube
4. Increases as the effective value of acceleration due to gravity is decreased
Answer
8320