$$\begin{array}{cccc} H & H & H & H \\ | & | & | & | \\ H-C-C-C-C-H \\ | & | & | & | \\ H & H & H & H \end{array}$$

Question 1

Which of the following best describes a functional group in organic chemistry?

Accepted Answer

A group of atoms that determines the physical and chemical properties of a molecule.

Question 2

Which representation of organic molecules provides information about the connectivity between atoms but may not accurately reflect the geometry?

Accepted Answer

Expanded / 2-D Projection / 2-D Structural Formula

Question 3

Given the molecular formula $$\mathrm{C_3H_8}$$, which of the following is true?

Accepted Answer

It does not indicate how the atoms are joined.

Question 4

Which everyday organic molecule is used as a sweetener and has the following structure: $$\mathrm{C$$_{12}$$H_{22}O$$_{11}}$?

Accepted Answer

Sucrose

Question 5

What is the main difference between a condensed structural formula and a molecular formula?

Accepted Answer

Condensed structural formula shows the grouping of atoms, while molecular formula only shows the composition.

Question 6

Which concept in organic chemistry is best illustrated by the use of curved arrow notation?

Accepted Answer

The flow of electrons during bond breaking and formation.

Question 7

Which of the following molecules contains an aromatic ring?

Accepted Answer

Benzene

Question 8

In the historical synthesis of urea, which reactants and conditions were used?

Accepted Answer

$$\mathrm{NH_4$^+}$$ and $$\mathrm{N\equiv C=O}$$ with heat

Question 9

Which of the following is NOT a correct way to represent an organic molecule?

Accepted Answer

Crystal lattice diagram

Question 10

Which functional group is present in ethanol?

Accepted Answer

Hydroxyl group ($$\mathrm{-OH})$$

Question 11

Which molecule is responsible for the blue color in jeans?

Accepted Answer

Indigo

Question 12

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

Accepted Answer

$$\mathrm{CH_3CH_2CH_3}$$

Question 13

Which molecule is used to fight malaria and contains a bicyclic structure?

Accepted Answer

Quinine

Question 14

Which of the following best describes stereochemistry?

Accepted Answer

The arrangement of atoms in space and the shapes of molecules.

Question 15

Which molecule is a major constituent of gasoline and is highly branched?

Accepted Answer

Isocotane

Question 16

Which of the following is a correct expanded 2-D structural formula for butane?

Accepted Answer

$$\begin{array}{cccc} H & H & H & H \ | & | & | & | \ H-C-C-C-C-H \ | & | & | & | \ H & H & H & H \end{array}$$

Question 17

Which molecule is responsible for the flavor in vanilla?

Accepted Answer

Vanillin

Question 18

Which of the following statements about organic chemistry is correct?

Accepted Answer

It is the chemistry of carbon compounds.

Question 19

Which molecule is a sex hormone for the Japanese beetle?

Accepted Answer

Japonilure

Question 20

Which of the following is the best representation for showing the tetrahedral geometry at each carbon atom in a molecule?

Accepted Answer

3D-perspective drawing (projection formula)

Structure and Naming of Organic Molecules: Foundations of Organic Chemistry

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