Question 1

Refer to the first image (Lewis structure for SO₃). What is the molecular geometry (shape) of SO₃, and what is the bond angle between the oxygen atoms?

Accepted Answer

Trigonal planar, $$120^\circ$$

Question 2

Which functional group is shown in the second image (R–COOR)?

Accepted Answer

Ester

Question 3

Which functional group is shown in the third image (R–COOH)?

Accepted Answer

Carboxylic acid

Question 4

Which functional group is shown in the fourth image (R–CO–R)?

Accepted Answer

Ketone

Question 5

Which functional group is shown in the fifth image (R–COH)?

Accepted Answer

Aldehyde

Question 6

The sixth image shows a line structure with a triple bond. Which type of hydrocarbon does this represent?

Accepted Answer

Alkyne

Question 7

The seventh image shows a hexagonal ring with alternating double bonds. What is the name of this structure?

Accepted Answer

Benzene (aromatic hydrocarbon)

Question 8

The eighth image shows a molecule with the formula $$\mathrm{CH_3CH=CHCHO}. $$Which functional groups are present in this molecule?

Accepted Answer

Aldehyde and alkene

Question 9

Refer to the ninth image. Which structure represents 2,3,5-trimethylheptane?

Accepted Answer

d

Question 10

Refer to the tenth image. Which pair of compounds are cis-trans isomers?

Accepted Answer

A

Question 11

Refer to the eleventh image. Which structure is a ketone?

Accepted Answer

A (third structure)

Question 12

Refer to the twelfth image. What is the relationship between the two cyclohexane molecules shown?

Accepted Answer

They are stereoisomers (cis-trans isomers)

Question 13

Refer to the thirteenth image. How many chiral carbons are present in this molecule (glucose)?

Accepted Answer

4

Question 14

Refer to the fourteenth image. Is the carbon atom shown chiral?

Accepted Answer

Yes, because it is attached to four different groups

Question 15

Refer to the fifteenth image. What is the IUPAC name for this compound?

Accepted Answer

2-butanol

Question 16

Refer to the sixteenth image. What is the molecular formula for this molecule?

Accepted Answer

$$\mathrm{C_3H_8}$$

Question 17

Refer to the seventeenth image. What is the degree of unsaturation in this molecule?

Accepted Answer

1 (one double bond)

GOB Chemistry Exam 2 Review – Step-by-Step Study Guidance

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