Unit 3 Target 3: Properties of Water Quiz

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1/11 Questions

Which of the following characteristics of water is not a result of hydrogen bonding?
- Adhesive strength
- Capillarity
- Cohesive strength
- All of the answers are a result of hydrogen bonding

About This Quiz

This quiz tests understanding of water's properties and its role in plant physiology, including concepts like transpiration and hydrogen bonding in water molecules.

Unit 3 Target 3: Properties Of Water Quiz - Quiz

2.

Which of the following makes up a molecule of water?
- One atom of hydrogen and one atom of oxygen
- One atom of sodium and one atom of chlorine
- One atom of hydrogen and two atoms of oxygen
- Two atoms of hydrogen and one atom of oxygen
Correct Answer

A. Two atoms of hydrogen and one atom of oxygen

Explanation

A molecule of water is made up of two atoms of hydrogen and one atom of oxygen. This is because the chemical formula for water is H2O, indicating that there are two hydrogen atoms bonded to one oxygen atom.

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3.

A stalk of celery is placed in a solution of blue colored dye. After one hour, the leaves have blue fluid in their veins. Which property of water is being demonstrated?
- Adhesion and cohesion
- Evaporation and cooling
- Lower density as a solid than as a liquid
- High specific heat
- Surface tension
Correct Answer

A. Adhesion and cohesion

Explanation

Adhesion and cohesion are being demonstrated in this scenario. Adhesion refers to the attraction between water molecules and other substances, in this case, the celery stalk. Cohesion refers to the attraction between water molecules themselves. The blue dye solution is able to adhere to the surface of the celery stalk, and the water molecules within the stalk are cohesive, allowing the blue fluid to be transported through the veins of the leaves.

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4.

Which property of water is described in the picture below?
- Capillary action
- Surface tension
- Transpiration
- Adhesion ONLY
Correct Answer

A. Surface tension

Explanation

The picture is likely showing water droplets forming a dome shape on a surface, which is a characteristic of surface tension. Surface tension is the property of a liquid that causes the molecules at the surface to be attracted to each other, creating a "skin" or "film" on the surface. This property allows insects to walk on water and for water to form droplets. Capillary action is the ability of a liquid to flow against gravity in a narrow space, transpiration is the process of water movement through a plant, and adhesion is the attraction between different substances.

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5.

Honey is composed mostly of glucose and fructose. What property of water explains why honey dissolves easily in water?
- Water exhibits strong cohesion.
- Water has a high specific heat.
- Water is a polar molecule.
- Water is easily ionized.
Correct Answer

A. Water is a polar molecule.

Explanation

Water is a polar molecule because it has a slightly positive charge on one end and a slightly negative charge on the other due to its bent shape and unequal distribution of electrons. This polarity allows water molecules to attract and interact with other polar molecules, such as glucose and fructose in honey. As a result, water can easily dissolve honey by surrounding and separating its individual molecules, breaking the attractive forces between them.

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6.

Lamila wants to determine the rate at which a plant uses water. She fills a beaker with 80 mL of water and places a leafy flower stem into the beaker through a small opening in the beaker’s cap. Lamila then places the beaker near a sunny window. One week later, 47 mL of water remains in the beaker. What plant process best explains the loss of water in the beaker?
- Germination
- Photosynthesis
- Respiration
- Transpiration
Correct Answer

A. Transpiration

Explanation

The best explanation for the loss of water in the beaker is transpiration. Transpiration is the process by which water is lost from the leaves of plants through small openings called stomata. When the plant is exposed to sunlight, it undergoes photosynthesis, which requires water. As a result, water is drawn up through the stem and leaves and is eventually lost through transpiration. This explains the decrease in water level in the beaker over time.

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7.

Water molecules are polar, with the
- Oxygen side being slightly positive and the hydrogen side being slightly negative.
- Oxygen and hydrogen sides being slightly positive.
- Oxygen and hydrogen sides being slightly negative.
- Oxygen side being slightly negative and the hydrogen side being slightly positive.
Correct Answer

A. Oxygen side being slightly negative and the hydrogen side being slightly positive.

Explanation

Water molecules are polar because the oxygen atom attracts the shared electrons more strongly than the hydrogen atoms. This causes the oxygen side of the molecule to have a slight negative charge, while the hydrogen side has a slight positive charge.

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8.

The cohesiveness between water molecules is due largely to:
- Hydrogen bonds.
- Polar covalent bonds.
- Nonpolar covalent bonds.
- Ionic bonds.
- Hydrophobic interactions.
Correct Answer

A. Hydrogen bonds.

Explanation

The cohesiveness between water molecules is due largely to hydrogen bonds. Hydrogen bonds are formed between the positively charged hydrogen atom of one water molecule and the negatively charged oxygen atom of another water molecule. These bonds are relatively weak individually, but when many hydrogen bonds are formed between water molecules, they create a strong cohesive force. This cohesive force allows water molecules to stick together, giving water its unique properties such as high surface tension and the ability to form droplets.

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9.

Methane (CH4), oxygen (O2), and nitrogen (N2) are gases at room temperature. Water (H2O) has a similar molecular weight to these molecules. Why is H2O a liquid at room temperature?
- H2O has a high viscosity.
- H2O has a high boiling point.
- Adjacent H2O molecules form hydrogen bonds.
- Nonpolar covalent bonds hold H2O molecules together.
Correct Answer

A. H2O has a high boiling point.
10.

Which of the following statements best describes how, in trees, water moves from the roots to the leaves?
- Transpiration from the leaves pulls water upward.
- Gravity continually pulls water and nutrients upward.
- Xylem contracts and pushes water and nutrients upward.
- Trees use energy from ATP to push water and nutrients upward.
Correct Answer

A. Transpiration from the leaves pulls water upward.

Explanation

Transpiration is the process by which water vapor is lost from the leaves through tiny pores called stomata. As water evaporates from the leaves, it creates a negative pressure, or tension, which pulls water molecules up through the xylem vessels in the stem and roots. This process is known as the cohesion-tension theory. Therefore, the statement "Transpiration from the leaves pulls water upward" best describes how water moves from the roots to the leaves in trees.

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11.

Which characteristic of water molecules directly contributes to the remarkable "water walking" success of the aquatic insects pictured in the accompanying figure?
- Hydrogen bonds
- Capillary action
- Nonpolar covalent bonds
- Ionic bonds
- Adhesive forces
Correct Answer

A. Hydrogen bonds

Explanation

Hydrogen bonds are the attractive forces between the positively charged hydrogen atom of one water molecule and the negatively charged oxygen atom of another water molecule. These bonds are responsible for the cohesive nature of water and give it its high surface tension. This surface tension allows certain insects to walk on water, as the hydrogen bonds create a strong enough force to support their weight. Capillary action, nonpolar covalent bonds, ionic bonds, and adhesive forces do not directly contribute to the water walking ability of these insects.

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Sep 15, 2014

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Unit 3 Target 3: Properties Of Water Quiz

Which of the following characteristics of water is not a result of hydrogen bonding?

Quiz Preview

Which of the following makes up a molecule of water?

A stalk of celery is placed in a solution of blue colored dye. After one hour, the leaves have blue fluid in their veins. Which property of water is being demonstrated?

Which property of water is described in the picture below?

Honey is composed mostly of glucose and fructose. What property of water explains why honey dissolves easily in water?

Water molecules are polar, with the

The cohesiveness between water molecules is due largely to:

Methane (CH4), oxygen (O2), and nitrogen (N2) are gases at room temperature. Water (H2O) has a similar molecular weight to these molecules. Why is H2O a liquid at room temperature?

Which of the following statements best describes how, in trees, water moves from the roots to the leaves?

Which characteristic of water molecules directly contributes to the remarkable "water walking" success of the aquatic insects pictured in the accompanying figure?