Question 1

Which change would most likely make an atom more chemically reactive?

Accepted Answer

C. An incomplete valence shell

Question 2

Why do nonpolar covalent molecules typically not dissolve in water?

Accepted Answer

B. They are hydrophobic

Question 3

If the electronegativity difference between two atoms increases, the bond between them becomes:

Accepted Answer

B. More polar

Question 4

Which functional group determines the biological importance of hydrogen bonds?

Accepted Answer

A. Hydroxyl group in alcohols

Question 5

Why does water have a high specific heat?

Accepted Answer

B. Hydrogen bonds must be broken to raise temperature

Question 6

Which property of water directly contributes to temperature regulation in plants?

Accepted Answer

B. High specific heat

Question 7

A solution with a pH of 4 has how many times more hydrogen ions than a solution with a pH of 7?

Accepted Answer

B. 1000 times

Question 8

Which of the following would most likely disrupt enzyme activity in a cell?

Accepted Answer

B. A significant change in pH

Question 9

Which statement best explains why ice floats on liquid water?

Accepted Answer

B. Hydrogen bonds form a rigid lattice that spaces molecules apart

Question 10

Which experimental result would best indicate the presence of a buffer solution?

Accepted Answer

A. pH remains constant when small amounts of acid are added

Question 11

A biologist adds a strong acid to a beaker of pure water and to a beaker of blood. The pH of the water drops sharply, but the pH of the blood changes only slightly. What property of blood explains this?

Accepted Answer

A. Blood contains buffers

Question 12

Which of the following best describes the relationship between cohesion and surface tension in water?

Accepted Answer

B. Cohesion increases surface tension

Question 13

Which equation correctly represents the dissociation of water?

Accepted Answer

A. $$2H_2O \rightarrow H_3O^+ + OH^-$$

Question 14

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-6}$$ M. What is its pH?

Accepted Answer

A. 6

Question 15

Which property of water allows it to move upward from the roots to the leaves in plants?

Accepted Answer

B. Cohesion and adhesion

Study Notes: The Chemical Context of Life & Water and Life (Chapters 2 & 3)

Study Guide - Practice Questions

Study Guide - Flashcards