Question 1

Which type of bond is responsible for the unique properties of water, such as cohesion and high specific heat?

Accepted Answer

Hydrogen bonds

Question 2

Why does ice float on liquid water?

Accepted Answer

Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid water.

Question 3

Which of the following is an emergent property of water that is essential for life?

Accepted Answer

Density of solid is less than liquid

Question 4

A spider can walk across the surface of a small pond without sinking. Which property of water makes this possible?

Accepted Answer

High surface tension

Question 5

Which of the following best explains why water has a high specific heat?

Accepted Answer

Hydrogen bonds between water molecules require more energy to break.

Question 6

What is the main reason water is called the 'universal solvent'?

Accepted Answer

It can dissolve a wide variety of substances due to its polarity.

Question 7

Which of the following best describes the process of evaporation?

Accepted Answer

The conversion of a liquid into a vapor.

Question 8

Which property of water allows it to moderate Earth's climate by absorbing and releasing large amounts of heat with only slight temperature change?

Accepted Answer

High specific heat

Question 9

What is the charge distribution in a water molecule due to its polarity?

Accepted Answer

Oxygen is slightly negative, hydrogens are slightly positive.

Question 10

Which of the following is a direct consequence of water's high heat of vaporization for living organisms?

Accepted Answer

Evaporation of sweat cools the body efficiently.

Question 11

A beaker contains 100 g of water at $$25^\circC. $$How much energy (in calories) is required to raise the temperature of the water to $$35^\circC$$? (Specific heat of water $$= 1 \ \mathrm{cal/g\cdot ^\circ C})$$

Accepted Answer

$$1000 \ \mathrm{cal}$$

Question 12

Which of the following statements about the density of water and ice is correct?

Accepted Answer

Liquid water is denser than ice.

Question 13

Which property of water is most important for the transport of nutrients and waste in biological systems?

Accepted Answer

Universal solvent property

Question 14

Which of the following best describes cohesion in water?

Accepted Answer

Water molecules stick to each other.

Question 15

A solution in which water is the solvent is called:

Accepted Answer

Aqueous

Question 16

Which of the following effects can occur because of the high surface tension of water?

Accepted Answer

A spider can walk across the surface of a small pond.

Question 17

Which of the following is NOT an emergent property of water?

Accepted Answer

High density of solid compared to liquid water

Question 18

Which of the following best explains why water is able to dissolve ionic compounds like NaCl?

Accepted Answer

Water's polarity allows it to surround and separate ions.

Question 19

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

Accepted Answer

Water has a high heat of vaporization.

Question 20

Which of the following statements about water molecules is correct?

Accepted Answer

The oxygen atom is more electronegative than the hydrogen atoms.

Properties of Water: Structure, Bonding, and Emergent Properties

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