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Test: Liquid State - Chemistry MCQ


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10 Questions MCQ Test - Test: Liquid State

Test: Liquid State for Chemistry 2024 is part of Chemistry preparation. The Test: Liquid State questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Liquid State MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Liquid State below.
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Test: Liquid State - Question 1

1 poise = ________.

Detailed Solution for Test: Liquid State - Question 1

Poise is the unit of viscosity. It’s S.I. unit is 1 Newton second per square meter. It’s Pascal second. In C.G.S. system, the unit of viscosity is poise that is named after a scientist Jean Louise
Poiseuille. So, it’s 1 poise = 0.1 kgm-1s-1.

Test: Liquid State - Question 2

In a liquid, the force required to maintain the flow of layers is 5N, velocity gradient in du/dx, area of contact is 20m2. Then what is the value of viscosity?

Detailed Solution for Test: Liquid State - Question 2

The formula of force required to maintain the flow of layers is given by the formula F = ηAdu/dz, where η is the coefficient of viscosity, A is the area of contact and du/dz is the velocity gradient. So by substituting we get an answer as 0.25dz/du.

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Test: Liquid State - Question 3

What is S.I. unit of Surface Tension?

Detailed Solution for Test: Liquid State - Question 3

Surface Tension is the tendency of a fluid to occupy least surface area as possible. It is defined as the force per unit distance. So, the units of surface tension are Newton/meter in S.I. the system, Dyne/cm in C.G.S system.

Test: Liquid State - Question 4

A water drop is spherical in shape due to _______.

Detailed Solution for Test: Liquid State - Question 4

Surface Tension is the tendency of a fluid to occupy least surface area as possible. It is defined as the force per unit distance. So, the spherical shape that is acquired by a water drop is due to surface tension.

Test: Liquid State - Question 5

Higher the viscosity, the slower the liquid flows.

Detailed Solution for Test: Liquid State - Question 5

Viscosity is defined as the resistance to the flow of a liquid. It opposes a liquid’s layer movement with respect to one another. So, the above statement: the higher the viscosity, the slower the liquid flows is true.

Test: Liquid State - Question 6

What is the boiling point at pressure 1 atm known as?

Detailed Solution for Test: Liquid State - Question 6

The boiling point at pressure 1 atm is known as normal boiling point. Normal boiling point is slightly greater than the standard boiling point as molecules change into the vapor phase and density of vapor increases.

Test: Liquid State - Question 7

Viscosity of liquid _________ with rise in temperature.

Detailed Solution for Test: Liquid State - Question 7

The viscosity of gases increases with temperature, whereas the viscosity of liquids decreases with temperature.

Test: Liquid State - Question 8

Path in liquid in which layers do not meet each other is _______

Detailed Solution for Test: Liquid State - Question 8

The type of flow in liquids when each path flows in a different path, that do not interfere with each other is laminar flow. At any point in the fluid, the velocity of a fluid is constant is a characteristic of laminar flow.

Test: Liquid State - Question 9

If the angle of contact between the liquid and container is 90 degrees then? (C is the cohesive and A is the Adhesive force)

Detailed Solution for Test: Liquid State - Question 9

When the angle of contact between the liquid and container is 90 degrees then the cohesive and adhesive forces in a liquid are equal. Cohesive force is the attraction between similar atoms and adhesive between different atoms.

Test: Liquid State - Question 10

The surface tension of  liquid is _________ at critical temperature.

Detailed Solution for Test: Liquid State - Question 10

The surface tension in liquids decreases with rise in temperature. As surface tension decreases, molecules become more active when temperature increases and surface tension becomes zero at critical temperature TC.

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