Question 1

Which property of water allows it to move upward through the vessels of plants against gravity?

Accepted Answer

Adhesion due to hydrogen bonding

Question 2

Why does sweating help cool the human body without causing a significant drop in body temperature?

Accepted Answer

Water has a high heat of vaporization

Question 3

What is the main reason ice floats on liquid water?

Accepted Answer

Hydrogen bonds keep water molecules farther apart in ice

Question 4

Which of the following best describes a buffer in biological systems?

Accepted Answer

A substance that maintains pH by releasing or absorbing H$$^+$$ ions

Question 5

If the pH of a solution changes from 6 to 3, by what factor does the H$$^+$$ concentration change?

Accepted Answer

$$1000$$

Question 6

Which of the following is an example of an aqueous solution?

Accepted Answer

Salt dissolved in water

Question 7

What is the pH of a neutral aqueous solution at 25°C?

Accepted Answer

$$7$$

Question 8

Which of the following best explains why water is an effective solvent for ionic compounds?

Accepted Answer

Water molecules form hydrogen bonds with ions

Question 9

What happens to the concentration of OH$$^-$$ ions if acid is added to a neutral solution?

Accepted Answer

It decreases

Question 10

Which process is primarily responsible for the formation of acid rain?

Accepted Answer

Mixing of water vapor with sulfuric and nitric acids from fossil fuel combustion

Question 11

Ocean acidification is mainly caused by which of the following?

Accepted Answer

Increase in atmospheric CO$$_2$$ dissolving in seawater

Question 12

Which property of water is most important for maintaining stable temperatures in lakes and oceans?

Accepted Answer

High specific heat

Question 13

A substance that directly accepts H$$^+$$ ions in solution is classified as a:

Accepted Answer

Base

Question 14

Which of the following best describes the relationship between pH and H$$^+$$ concentration?

Accepted Answer

pH decreases as H$$^+$$ concentration increases

Question 15

Which of the following is a real-world consequence of ocean acidification?

Accepted Answer

Reduction in available calcium for marine organisms

Question 16

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

Accepted Answer

Hydrogen bonds must be broken to raise the temperature

Question 17

Which of the following is NOT a property of water that results from hydrogen bonding?

Accepted Answer

Hydrophobicity

Question 18

A solution with a pH of 2 is best described as:

Accepted Answer

Strongly acidic

Question 19

Which of the following best describes the effect of buffers in human blood?

Accepted Answer

They prevent drastic changes in pH

Question 20

Which of the following is a correct statement about acids and bases?

Accepted Answer

Acids increase H$$^+$$ concentration in solution

Water and Life: Properties, Solutions, and Environmental Impact

Study Guide - Practice Questions