$$[H^+] = 1 \times 10$$^{-3}$$ M

Question 1

Which property of water allows it to minimize temperature changes in living organisms, helping maintain homeostasis?

Accepted Answer

High specific heat

Question 2

A solution has a pH of 3. What is the concentration of hydrogen ions $$[H^+] in $$this solution?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-3}$$ M

Question 3

Which of the following best explains why water is not effective in cleaning an oily salad bowl?

Accepted Answer

Oils are hydrophobic and do not interact with water molecules.

Question 4

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

Forming a disaccharide from two monosaccharides

Question 5

Which of the following statements about acids is TRUE?

Accepted Answer

Acids release hydrogen ions ($$H^+) $$when dissolved in water.

Question 6

If the pH of lemon juice is 2 and the pH of orange juice is 4, how much more acidic is lemon juice compared to orange juice?

Accepted Answer

100 times more acidic

Question 7

Which of the following is NOT a property of water that is essential for life?

Accepted Answer

Low specific heat

Question 8

Which of the following best describes a buffer system in the human body?

Accepted Answer

A weak acid and a weak base that minimize changes in pH

Question 9

Which of the following compounds is considered inorganic?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 10

What is the result of mixing hydrochloric acid ($$HCl) $$and sodium hydroxide ($$NaOH) in a $$neutralization reaction?

Accepted Answer

Water and sodium chloride ($$NaCl)$$

Question 11

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Unsaturated fatty acids have kinks due to double bonds, making them liquid at room temperature.

Question 12

Which of the following ions is most important for nerve impulse transmission in the human body?

Accepted Answer

Sodium ($$Na^+)$$

Question 13

Which of the following is a correct statement about the pH scale?

Accepted Answer

Each pH unit represents a tenfold difference in $$[H^+]$$ concentration.

Question 14

Which of the following is a function of water in the human body?

Accepted Answer

Acts as a transport medium for nutrients and waste

Question 15

Which of the following best describes the role of electrolytes in the body?

Accepted Answer

They conduct electrical currents in solution, essential for body functions.

Question 16

Which of the following is a monosaccharide?

Accepted Answer

Glucose

Question 17

Which of the following is TRUE about dehydration synthesis?

Accepted Answer

It forms polymers from monomers by removing water.

Question 18

A buffer system in blood helps maintain pH by:

Accepted Answer

Converting strong acids and bases into weak ones

Question 19

Which of the following is a polysaccharide used for energy storage in animals?

Accepted Answer

Glycogen

Question 20

If maltose is formed from two glucose molecules ($$C_6H_{12}O_6$) by dehydration synthesis, what is the molecular formula of maltose?

Accepted Answer

$$C_{12}H$$_{22}$$O_{11}$

Fundamentals of Chemistry in Anatomy & Physiology: Organic, Inorganic Compounds, Water, Acids, Bases, and pH

Study Guide - Practice Questions