Question 1

Which of the following correctly identifies the functional group present in the molecule with the condensed formula CH3CH2OCH3?

Accepted Answer

Ether

Question 2

Which of the following statements about bond length and bond strength is correct?

Accepted Answer

A double bond is shorter and stronger than a single bond.

Question 3

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2CH_2Br}$$?

Accepted Answer

1-Bromopropane

Question 4

Which of the following molecules is chiral?

Accepted Answer

2-Butanol ($$\mathrm{CH_3CH(OH)CH_2CH_3})$$

Question 5

A fatty acid is described as 18:2(Δ9,12). Which of the following statements is true?

Accepted Answer

It is a polyunsaturated fatty acid with 18 carbons and double bonds at carbons 9 and 12.

Question 6

Which of the following best describes an exothermic reaction?

Accepted Answer

A reaction where $$\Delta H is $$negative and heat is released.

Question 7

Which of the following changes will increase the rate of a chemical reaction?

Accepted Answer

Adding a catalyst

Question 8

Which of the following is an example of a hydrolysis reaction?

Accepted Answer

The breakdown of a disaccharide into two monosaccharides in the presence of water

Question 9

Which of the following best describes the difference between an aldose and a ketose?

Accepted Answer

An aldose contains an aldehyde group, while a ketose contains a ketone group.

Question 10

Which of the following is a reducing sugar?

Accepted Answer

Glucose

Question 11

Which of the following best describes the glycosidic bond in maltose?

Accepted Answer

An $$\alpha-1$$,4-glycosidic bond between two glucose units

Question 12

Which polysaccharide is the primary structural component of plant cell walls?

Accepted Answer

Cellulose

Question 13

Which of the following best describes the difference between amylose and amylopectin?

Accepted Answer

Amylose is unbranched, while amylopectin is branched.

Question 14

A gas is contained in a cylinder at a pressure of 2.0 atm. If the volume is decreased from 4.0 L to 2.0 L at constant temperature, what is the new pressure according to Boyle’s Law?

Accepted Answer

$$4.0\ \mathrm{atm}$$

Question 15

Which of the following best describes a structural isomer?

Accepted Answer

Molecules with the same molecular formula but different connectivity of atoms

Question 16

Which of the following statements about enantiomers is correct?

Accepted Answer

They have identical physical properties except for the direction in which they rotate plane-polarized light.

Question 17

Which of the following best describes the effect of increasing temperature on the rate of a chemical reaction?

Accepted Answer

The rate increases because more molecules have sufficient energy to react.

Question 18

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_3CH_2COCH_3}$$?

Accepted Answer

2-Butanone

Question 19

Which of the following best describes the difference between a primary, secondary, and tertiary alcohol?

Accepted Answer

A primary alcohol has the $$\mathrm{OH}$$ group attached to a carbon bonded to one other carbon; secondary to two; tertiary to three.

Question 20

Which of the following best describes the universal donor blood type and its significance?

Accepted Answer

Type O, because it lacks A and B antigens and can be given to any recipient.

General Chemistry: Organic Molecules, Thermochemistry, Carbohydrates, and Gas Laws

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