Structure of Water and Hydrogen Bonding

A hydrogen bond is a weak attraction between:

• Two protons

• A hydrogen atom and an oxygen atom in different molecules

• Two oxygen atoms

• Two carbon atoms

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SYI-1A

Topic-1.1

Which of the following properties of water is a result of hydrogen bonding?

• High heat capacity

• Low surface tension

• Low specific heat

• Low heat of vaporization

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SYI-1A

Topic-1.1

Water's polarity is primarily due to:

• Unequal sharing of electrons between hydrogen and oxygen

• Equal sharing of electrons between hydrogen and oxygen

• The presence of only oxygen atoms in the water molecule

• The absence of hydrogen atoms in the water molecule

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Topic-1.1

SYI-1A

Adhesion and cohesion in water are due to:

• Hydrogen bonds between water molecules

• Covalent bonds between water molecules

• Hydrogen bonds between a water molecule and a different molecule

• Ionic bonds between water molecules

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SYI-1A

Topic-1.1

Explain how hydrogen bonding in water contributes to its high specific heat capacity.

• Hydrogen bonds store heat, releasing it slowly as they break

• Hydrogen bonds prevent any heat absorption

• Hydrogen bonds increase the kinetic energy of water molecules

• Hydrogen bonds create a crystalline structure in water

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DOK Level 2: Skill/Concept

What type of bond is primarily responsible for the unique properties of water?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

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DOK Level 1: Recall

Why does water have a high surface tension compared to most other liquids?

• Because of its low molecular weight

• Due to the hydrogen bonds between water molecules

• Because of its high specific heat capacity

• Due to the covalent bonds within the water molecule

What type of bond is primarily responsible for the unique properties of water, including its high specific heat and surface tension?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

The hydrogen bonds between water molecules are:

• Strong covalent bonds

• Weak electrostatic attractions

• Ionic bonds

• Hydrophobic interactions

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SYI-1A

Topic-1.1

In a water molecule, oxygen has a:

• Slight positive charge

• Slight negative charge

• Neutral charge

• Strong positive charge

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SYI-1A

Topic-1.1