Question 1

Which type of bond connects a fatty acid to a long-chain alcohol in a wax molecule?

Accepted Answer

Ester bond

Question 2

What property do waxes possess that makes them useful for coating leaves and feathers?

Accepted Answer

Water-repellent

Question 3

In the formation of a wax, which functional group of the fatty acid reacts with the alcohol?

Accepted Answer

Carboxyl group

Question 4

Which of the following best describes the structure of a wax?

Accepted Answer

A simple lipid composed of a long-chain alcohol and a fatty acid

Question 5

What is the main function of waxes in plants?

Accepted Answer

Protective coating

Question 6

During the synthesis of a wax, what is the byproduct formed when the ester bond is created?

Accepted Answer

Water

Question 7

Given the reaction: $$\mathrm{CH_3$(CH_2$)_{14}OH} + \mathrm{CH_3$(CH_2$)_{14}COOH} \rightarrow$$ wax + byproduct, what is the byproduct?

Accepted Answer

$$\mathrm{H_2O}$$

Question 8

Which step is necessary to form a wax from a long-chain alcohol and a fatty acid?

Accepted Answer

Condensation (dehydration synthesis)

Question 9

If a wax is formed from cetyl alcohol ($$\mathrm{CH_3$(CH_2$)_{15}OH}) $$and palmitic acid ($$\mathrm{CH_3$(CH_2$)_{14}COOH}$$), what is the formula of the wax produced?

Accepted Answer

$$\mathrm{CH_3$(CH_2$)_{15}OCO(CH_2$)_{14}CH_3$}$$

Question 10

Which of the following is NOT a component of a wax molecule?

Accepted Answer

Amino acid

Question 11

What type of reaction occurs when a wax is hydrolyzed in the presence of water?

Accepted Answer

Hydrolysis

Question 12

Which of the following best explains why waxes are insoluble in water?

Accepted Answer

They are nonpolar molecules

Question 13

Which functional group is formed when a wax is synthesized from a fatty acid and an alcohol?

Accepted Answer

Ester group ($$-COO-)$$

Question 14

A wax is formed from a fatty acid and an alcohol. Which of the following best describes the process?

Accepted Answer

The hydroxyl group of the alcohol reacts with the carboxyl group of the fatty acid, releasing water and forming an ester bond.

Question 15

Which of the following is a real-world application of waxes?

Accepted Answer

They are used as protective coatings on fruits to prevent water loss.

Question 16

Which statement is TRUE regarding the formation of waxes?

Accepted Answer

Waxes are formed by the condensation of a long-chain alcohol and a fatty acid.

Question 17

Which of the following is the correct sequence of steps in the synthesis of a wax from a fatty acid and an alcohol?

Accepted Answer

Draw structures, remove $$\mathrm{H_2O}$$, form ester bond

Question 18

Which of the following best describes the role of waxes in nature?

Accepted Answer

They provide a protective, water-repellent barrier.

Question 19

Which chemical reaction is responsible for the formation of the ester bond in waxes?

Accepted Answer

Condensation reaction

Question 20

If a wax is hydrolyzed, which two products are formed?

Accepted Answer

Fatty acid and long-chain alcohol

Waxes: Structure, Properties, and Formation in GOB Chemistry

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