Question 1

Which of the following molecules is a tertiary alkyl halide?

Accepted Answer

$$\mathrm{(CH_3$)_3CCl}$$

Question 2

Which of the following statements best describes the difference between constitutional isomers and cis/trans diastereomers?

Accepted Answer

Constitutional isomers differ in the connectivity of their atoms, while cis/trans diastereomers have the same connectivity but differ in the arrangement around a double bond or ring.

Question 3

Which of the following compounds is an unsaturated hydrocarbon?

Accepted Answer

$$\mathrm{C_2H_4}$$

Question 4

Which of the following best describes the 3D geometry around each carbon atom in ethane ($$\mathrm{C_2H_6}$$)?

Accepted Answer

Tetrahedral, with bond angles of approximately $$109.5^\circ$$

Question 5

Which of the following reactions represents the complete combustion of propane ($$\mathrm{C_3H_8}$$)?

Accepted Answer

$$\mathrm{C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O}$$

Question 6

Which of the following molecules contains a chiral center?

Accepted Answer

$$\mathrm{CH_3CHBrCH_2CH_3}$$

Question 7

A polarimetry experiment is performed on a pure sample of a sugar. The observed rotation is $$+23.5^\circ. $$What does this indicate about the sample?

Accepted Answer

The sample is optically active and contains one enantiomer in excess.

Question 8

Which of the following is the correct IUPAC name for the compound with the structure $$\mathrm{CH_2$=CHCH_2CH_3}$$?

Accepted Answer

1-butene

Question 9

Which of the following alkenes can exhibit cis/trans (E/Z) isomerism?

Accepted Answer

$$\mathrm{CH_3CH=$$CHCH_3$$}$$

Question 10

Which of the following is a product of the hydration of 2-butene ($$\mathrm{CH_3CH=$$CHCH_3$$}) in $$the presence of acid?

Accepted Answer

2-butanol

Question 11

Which of the following is a secondary alcohol?

Accepted Answer

$$\mathrm{CH_3CHOHCH_3}$$

Question 12

Which of the following statements best explains why ethers generally have lower boiling points than alcohols of similar molecular weight?

Accepted Answer

Ethers cannot form hydrogen bonds with each other, while alcohols can.

Question 13

Which of the following is the correct IUPAC name for the compound $$\mathrm{CH_3COCH_2CH_3}$$?

Accepted Answer

2-butanone

Question 14

Which of the following reactions represents the oxidation of a primary alcohol to a carboxylic acid?

Accepted Answer

$$\mathrm{CH_3CH_2OH + 2[O] \rightarrow CH_3COOH + H_2O}$$

Question 15

Which of the following is the correct IUPAC name for the compound $$\mathrm{CH_3COOCH_2CH_3}$$?

Accepted Answer

ethyl ethanoate

Question 16

Which of the following best describes the product of the reaction between acetic acid ($$\mathrm{CH_3COOH}) $$and ethanol ($$\mathrm{CH_3CH_2OH}) in $$the presence of acid?

Accepted Answer

Ethyl acetate and water

Question 17

Which of the following molecules is a primary amine?

Accepted Answer

$$\mathrm{CH_3NH_2}$$

Question 18

Which of the following formulas corresponds to a carbohydrate?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$}$$

Question 19

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.

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