# How Much Do You Know About Viscosity Of Fluids?

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Viscosity is a crucial parameter for measuring the flow of fluids, such as liquids, semi-solids, gases and even solids. It can be defined as quantification of the frictional force that arises between two adjacent layers of fluid that are in relative motion. This quiz has been created to test your knowledge and make you understand about concepts of the viscosity of fluids So, let's try out the quiz. All the best!

• 1.

### What measures a material's resistance to flow?

• A.

Matter

• B.

Volume

• C.

Hardness

• D.

Tensile Strength

• E.

Viscosity

E. Viscosity
Explanation
Viscosity measures a material's resistance to flow. It is a property of fluids that determines how easily they flow or how resistant they are to flowing. A high viscosity means the material is thick and resistant to flow, while a low viscosity means the material is thin and flows easily.

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• 2.

### What happens to the viscosity of a liquid when its temeperature is raised?

• A.

The viscosity of the liquid increases.

• B.

The viscosity of the liquid stays the same.

• C.

The viscosity of the liquid decreases.

• D.

The temperature of a liquid does NOT raise.

• E.

Answer is not a choice

C. The viscosity of the liquid decreases.
Explanation
When the temperature of a liquid is raised, the kinetic energy of its molecules increases. This increased kinetic energy causes the molecules to move more rapidly and collide with each other more frequently. As a result, the intermolecular forces that hold the molecules together become weaker, leading to a decrease in viscosity. Therefore, the correct answer is that the viscosity of the liquid decreases when its temperature is raised.

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• 3.

### At lower temperatures what happens to the hydrogen atoms in the oleic acid molecules of olive oil?

• A.

The molecules tend to form tight connections called "hydrogen connections".

• B.

Nothing happens.

• C.

The molecules tend to form loose conections called "hydogen bonds".

• D.

The temperatures raises.

• E.

The olive oil loses molecules.

C. The molecules tend to form loose conections called "hydogen bonds".
Explanation
At lower temperatures, the hydrogen atoms in the oleic acid molecules of olive oil tend to form loose connections called "hydrogen bonds". This is a common phenomenon observed in many substances, where the partial positive charge on the hydrogen atom attracts the partial negative charge on another atom, typically oxygen or nitrogen, forming a weak bond. These hydrogen bonds play a crucial role in determining the physical properties of substances, such as their boiling points and solubility. In the case of olive oil, the formation of hydrogen bonds at lower temperatures contributes to its thicker consistency and solidification.

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• 4.

### As you raise the temperature of a gas what will happen?

• A.

It becomes more resistant to flow.

• B.

It becomes less resistance to flow.

• C.

It turns into a solid.

• D.

It turns into a liquid.

• E.

Nothing happens

A. It becomes more resistant to flow.
Explanation
As the temperature of a gas is raised, the average kinetic energy of its particles increases. This causes the gas molecules to move faster and collide more frequently with each other and with the walls of their container. These collisions create more resistance to the flow of the gas, making it more difficult for the gas to move freely. Therefore, the gas becomes more resistant to flow as its temperature increases.

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• 5.

### When friction increases what else increases?

• A.

Matter

• B.

Density

• C.

Elasticity

• D.

Viscosity

• E.

Number of molecules

D. Viscosity
Explanation
When friction increases, viscosity also increases. Viscosity is a measure of a fluid's resistance to flow. When friction is increased, it means that there is more resistance to the fluid's flow, resulting in an increase in viscosity. This can be observed in various fluids such as oils or syrups, where an increase in friction leads to a thicker and more resistant flow.

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• 6.

### Viscosity is determined mostly by what?

• A.

Density

• B.

The shape of the molecules the liquid.

• C.

What the liquid is specificaly.

• D.

Mass/Volume

• E.

Density*Volume

B. The shape of the molecules the liquid.
Explanation
Viscosity is determined mostly by the shape of the molecules in the liquid. The intermolecular forces between the molecules play a crucial role in determining the resistance to flow exhibited by a liquid. Liquids with more compact and regular molecular arrangements tend to have higher viscosities, as the molecules are more likely to interact and hinder the flow. On the other hand, liquids with more irregular and less compact molecular shapes have lower viscosities, as the molecules can move more freely past each other. Therefore, the shape of the molecules in a liquid is a key factor in determining its viscosity.

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• 7.

### Out the of the three liquids listed below, which is the most viscous?: 1. Ketchup 2. Vegtable oil 3. Water

• A.

2.Vegetable oil

• B.

3.Water

• C.

1.Ketchup

C. 1.Ketchup
Explanation
Ketchup is the most viscous out of the three liquids listed. Viscosity refers to the resistance of a fluid to flow, and ketchup has a higher viscosity compared to vegetable oil and water. This is because ketchup is a non-Newtonian fluid, meaning its viscosity can change depending on the applied force or shear rate. Ketchup is thicker and more resistant to flow due to the presence of particles, such as tomato solids and starch, which contribute to its higher viscosity.

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• 8.

### What is the definition of Low-viscosity?

• A.

When a solid, quickly flows out of its container.

• B.

Same definition as High-viscosity.

• C.

When a fluid, slowly empties from its container.

• D.

When a fluid quickly flows out of its container.

• E.

Answer is not shown

D. When a fluid quickly flows out of its container.
Explanation
Low-viscosity is defined as the property of a fluid to flow easily and quickly. When a fluid has low viscosity, it can easily and rapidly flow out of its container. This is in contrast to high-viscosity fluids, which are thicker and flow more slowly. Therefore, the correct answer is "When a fluid quickly flows out of its container."

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• 9.

### Any substance that can flow is a

• A.

Liquid

• B.

Fluid

• C.

Gas

• D.

Water

B. Fluid
Explanation
A fluid is defined as any substance that can flow, including liquids and gases. Liquids are a type of fluid, but not all fluids are liquids. Gases, such as air, are also considered fluids because they can flow and take the shape of their container. Therefore, the correct answer is fluid.

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• 10.

### What principle is in effect when a ship displaces ocean water?

• A.

Archimedes'

• B.

Bernoulli's

• C.

Newton's Law of Motion

• D.

None

A. Archimedes'
Explanation
When a ship displaces ocean water, the principle of Archimedes is in effect. This principle states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid it displaces. In the case of a ship, as it floats on the water, it displaces a volume of water equal to its own weight. This displacement creates an upward force that counteracts the downward force of gravity, allowing the ship to float. Therefore, Archimedes' principle is the correct explanation for why a ship displaces ocean water.

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