Question 1

Which type of bond is primarily responsible for the cohesion between water molecules?

Accepted Answer

Hydrogen bonds

Question 2

Why does ice float on liquid water?

Accepted Answer

Ice has a lower density than liquid water because its hydrogen bonds form a lattice structure.

Question 3

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

Accepted Answer

High specific heat

Question 4

A drop of water placed on a penny forms a dome shape due to which property?

Accepted Answer

Cohesion

Question 5

Which equation correctly represents the dissociation of hydrochloric acid (HCl) in water?

Accepted Answer

$$\mathrm{HCl} \rightarrow \mathrm{H^+} + \mathrm{Cl^-}$$

Question 6

Which of the following best explains why water is considered the 'universal solvent'?

Accepted Answer

Water's polarity allows it to dissolve many ionic and polar substances.

Question 7

Which statement about buffers in biological systems is correct?

Accepted Answer

Buffers minimize changes in pH by accepting or donating $$\mathrm{H^+}$$ ions.

Question 8

What happens to the pH of a solution when a strong acid is added?

Accepted Answer

The pH decreases due to the release of $$\mathrm{H^+}$$ ions.

Question 9

Which of the following best describes a hydrophobic molecule?

Accepted Answer

It is nonpolar and does not dissolve in water.

Question 10

Which property of water is most important for the transport of nutrients and waste in living organisms?

Accepted Answer

Universal solvent property

Question 11

A solution with a pH of 3 has a hydrogen ion concentration that is how many times greater than a solution with a pH of 6?

Accepted Answer

1000 times greater

Question 12

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

Accepted Answer

Efficient temperature regulation due to slow evaporation

Question 13

Which of the following best describes the relationship between hydrogen ion concentration $$[\mathrm{H^+}]$$ and pH?

Accepted Answer

$$\mathrm{pH} = -\log_{10}[\mathrm{H^+}]$$

Question 14

Which of the following is true about the surface tension of water?

Accepted Answer

It is high due to strong hydrogen bonding between molecules.

Question 15

Which of the following best explains why lakes and oceans resist rapid temperature changes?

Accepted Answer

Water has a high specific heat.

Question 16

Which of the following reactions is most consistent with the action of a base in water?

Accepted Answer

$$\mathrm{NaOH} \rightarrow \mathrm{Na^+} + \mathrm{OH^-}$$

Question 17

Which of the following statements about homogeneous and heterogeneous solutions is correct?

Accepted Answer

Homogeneous solutions have uniformly distributed components.

Question 18

Which of the following is NOT an emergent property of water essential for life?

Accepted Answer

Ability to dissolve nonpolar molecules

Question 19

Which of the following best describes the action of a buffer in blood when acid is added?

Accepted Answer

It accepts $$\mathrm{H^+}$$ ions to minimize pH change.

Question 20

Which of the following statements about acids and bases is correct?

Accepted Answer

Bases increase the concentration of $$\mathrm{OH^-}$$ ions in solution.

Properties of Water: Structure, Intermolecular Forces, Acids, Bases, and pH

Study Guide - Practice Questions