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Surface Tension and Its Significance

Description: This quiz will test your understanding of surface tension and its significance in various fields.
Number of Questions: 15
Created by:
Tags: surface tension cohesion adhesion capillary action wetting
Attempted 0/15 Correct 0 Score 0

What is the primary factor responsible for surface tension?

  1. Electrostatic forces

  2. Gravitational forces

  3. Covalent bonding

  4. Hydrogen bonding


Correct Option: D
Explanation:

Surface tension arises due to the cohesive forces between molecules at the surface of a liquid, which are primarily hydrogen bonds in the case of water.

Which property of a liquid is directly related to its surface tension?

  1. Viscosity

  2. Density

  3. Boiling point

  4. Specific heat capacity


Correct Option: C
Explanation:

The boiling point of a liquid is elevated when its surface tension is high, as more energy is required to overcome the cohesive forces and vaporize the liquid.

What is the term used to describe the tendency of a liquid to resist being pulled apart?

  1. Surface tension

  2. Viscosity

  3. Cohesion

  4. Adhesion


Correct Option: C
Explanation:

Cohesion refers to the attractive forces between molecules of the same substance, which resist the separation of the liquid.

What is the angle formed between a liquid droplet and a solid surface called?

  1. Contact angle

  2. Critical angle

  3. Refractive angle

  4. Incident angle


Correct Option: A
Explanation:

The contact angle is the angle formed at the point where a liquid surface meets a solid surface.

Which of the following factors affects the surface tension of a liquid?

  1. Temperature

  2. Pressure

  3. Solute concentration

  4. All of the above


Correct Option: D
Explanation:

Surface tension is influenced by temperature, pressure, and solute concentration. Temperature and solute concentration generally have an inverse relationship with surface tension, while pressure has a direct relationship.

What is the phenomenon responsible for the upward movement of liquids in narrow tubes?

  1. Osmosis

  2. Diffusion

  3. Capillary action

  4. Evaporation


Correct Option: C
Explanation:

Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of external forces, due to the combined effects of surface tension and adhesion.

Which property of a liquid determines its ability to wet a solid surface?

  1. Viscosity

  2. Density

  3. Surface tension

  4. Polarity


Correct Option: D
Explanation:

The polarity of a liquid, which refers to the uneven distribution of charge within its molecules, influences its ability to wet a solid surface.

What is the term used to describe the ability of a liquid to resist penetration by a foreign object?

  1. Surface tension

  2. Viscosity

  3. Cohesion

  4. Adhesion


Correct Option: A
Explanation:

Surface tension is responsible for the resistance of a liquid to penetration by a foreign object, as it creates a barrier-like effect at the liquid's surface.

Which of the following applications utilizes surface tension?

  1. Inkjet printing

  2. Detergent action

  3. Waterproofing fabrics

  4. All of the above


Correct Option: D
Explanation:

Surface tension plays a crucial role in inkjet printing, detergent action, and waterproofing fabrics, among other applications.

What is the SI unit of surface tension?

  1. Newton per meter (N/m)

  2. Pascal (Pa)

  3. Joule per square meter (J/m^2)

  4. Erg per square centimeter (erg/cm^2)


Correct Option: A
Explanation:

Surface tension is expressed in units of force per unit length, which is Newton per meter (N/m) in the SI system.

Which of the following liquids has the highest surface tension at room temperature?

  1. Water

  2. Mercury

  3. Ethanol

  4. Glycerin


Correct Option: B
Explanation:

Mercury has the highest surface tension among the given liquids at room temperature, due to its strong intermolecular forces.

What is the relationship between surface tension and the formation of bubbles?

  1. Surface tension promotes bubble formation.

  2. Surface tension inhibits bubble formation.

  3. Surface tension has no effect on bubble formation.

  4. The relationship depends on the liquid's properties.


Correct Option: B
Explanation:

Surface tension acts against the expansion of bubbles, making it more difficult for them to form and persist.

Which of the following factors can decrease the surface tension of water?

  1. Adding salt

  2. Increasing temperature

  3. Adding soap

  4. All of the above


Correct Option: D
Explanation:

Adding salt, increasing temperature, and adding soap can all reduce the surface tension of water.

What is the significance of surface tension in the field of biology?

  1. It enables the movement of water and nutrients in plants.

  2. It helps insects walk on water.

  3. It contributes to the formation of cell membranes.

  4. All of the above


Correct Option: D
Explanation:

Surface tension plays a crucial role in various biological processes, including the movement of water and nutrients in plants, the ability of insects to walk on water, and the formation of cell membranes.

Which of the following is NOT a consequence of high surface tension?

  1. Water droplets forming spherical shapes

  2. Capillary action in narrow tubes

  3. Easy spreading of liquids on surfaces

  4. Formation of soap bubbles


Correct Option: C
Explanation:

High surface tension tends to minimize the surface area of a liquid, making it less likely to spread easily on surfaces.

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