Question 1

Which of the following statements best explains why carbon is the central element in organic chemistry?

Accepted Answer

Carbon can form long chains and single, double, and triple bonds, allowing for a diverse array of molecules.

Question 2

What is the correct molecular formula for a non-cyclic alkane with 7 carbon atoms?

Accepted Answer

$$\mathrm{C}_7\mathrm{H}_{16}$$

Question 3

Which functional group is present in both vanillin and cinnamaldehyde, giving them their characteristic flavors?

Accepted Answer

Aldehyde

Question 4

Which of the following molecules contains a tertiary alcohol functional group?

Accepted Answer

$$\mathrm{(CH}_3)_3\mathrm{COH}$$

Question 5

Which of the following best describes a constitutional isomer?

Accepted Answer

Compounds with the same chemical formula but atoms connected in a different order.

Question 6

A molecule contains a carbon atom bonded to four different groups. What property does this carbon atom exhibit?

Accepted Answer

It is a chiral center.

Question 7

Which of the following is the condensed structural formula for an ester functional group?

Accepted Answer

$$\mathrm{RCOOR'}$$

Question 8

Which type of isomerism is responsible for the difference in smell between (R)-carvone and (S)-carvone?

Accepted Answer

Optical isomerism

Question 9

Which of the following best describes the structure of an aromatic molecule?

Accepted Answer

A molecule containing a benzene ring-like structure.

Question 10

Which of the following is a correct statement about alkenes and alkynes?

Accepted Answer

Alkenes have double carbon-carbon bonds and alkynes have triple carbon-carbon bonds.

Question 11

Which of the following is the correct Greek prefix for a hydrocarbon with 8 carbon atoms?

Accepted Answer

oct-

Question 12

Which of the following functional groups is present in acetone?

Accepted Answer

Ketone

Question 13

Which of the following is a primary amine?

Accepted Answer

$$\mathrm{RNH}_2$$

Question 14

Which of the following statements about line-dash-wedge notation is correct?

Accepted Answer

A dash indicates a bond going into the page (away from you).

Question 15

Which of the following is a correct condensed structural formula for a carboxylic acid?

Accepted Answer

$$\mathrm{RCOOH}$$

Question 16

Which of the following molecules is a constitutional isomer of propanol ($$\mathrm{C}_3\mathrm{H}_8\mathrm{O}$$)?

Accepted Answer

Isopropanol

Question 17

Which of the following best describes a geometric isomer?

Accepted Answer

Compounds with the same connectivity but different spatial arrangement of atoms.

Question 18

Which functional group is present in melatonin and is responsible for its sleep-regulating properties?

Accepted Answer

Amide

Question 19

Which of the following is true about alkyl halides?

Accepted Answer

They are alkanes with a halogen attached, represented as $$\mathrm{R-X}.$$

Question 20

Which of the following is a correct statement about the difference between amines and amides?

Accepted Answer

Amines are N analogues of alcohols, while amides are N analogues of carboxylic acids.

Organic Chemistry I: Structures – Hydrocarbons, Functional Groups, and Isomerism

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