Question 1

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

Accepted Answer

A specific arrangement of atoms that gives a compound certain physical and chemical properties.

Question 2

Which of the following molecules contains a functional group that makes it significantly more reactive than ethane?

Accepted Answer

Ethanol ($$CH_3CH_2OH)$$

Question 3

What is the bond angle in a molecule with a tetrahedral geometry?

Accepted Answer

$$109.5^\circ$$

Question 4

Which of the following functional groups is present in both amoxicillin and vanilla flavor compounds?

Accepted Answer

Phenyl group

Question 5

The polar $$C=O$$ bond in a carbonyl group makes the carbonyl carbon:

Accepted Answer

An electrophile

Question 6

Which of the following is the correct IUPAC suffix for a compound containing a carboxylic acid group?

Accepted Answer

-oic acid

Question 7

Which of the following best explains why tertiary alkyl halides react rapidly in $$S_N1$$ reactions?

Accepted Answer

The resulting carbocation is highly stabilized by alkyl groups.

Question 8

What is the main difference between $$S_N1$$ and $$S_N2$$ nucleophilic substitution mechanisms?

Accepted Answer

$$S_N1$$ involves a carbocation intermediate, while $$S_N2$$ does not.

Question 9

Which of the following functional groups is characterized by the general structure $$R-COOR'$$?

Accepted Answer

Ester

Question 10

A molecule with the formula $$CH_3CH_2Br$$ undergoes an $$S_N2$$ reaction with $$OH^- in$$ $$DMF$$ solvent. What is the expected product?

Accepted Answer

$$CH_3CH_2OH$$

Question 11

Which of the following statements about the stereochemistry of $$S_N2$$ reactions is correct?

Accepted Answer

The configuration at the reacting carbon is inverted.

Question 12

Which of the following is NOT a property determined by the functional group of a molecule?

Accepted Answer

Atomic number of the molecule

Question 13

Which of the following best describes the inductive effect in organic molecules?

Accepted Answer

The polarization of a $$\sigma$$ bond due to differences in electronegativity between atoms.

Question 14

Which of the following functional groups is present in both amides and esters?

Accepted Answer

Carbonyl group ($$C=O)$$

Question 15

Which of the following is the correct order of carbocation stability relevant to $$S_N1$$ reactions?

Accepted Answer

Methyl \u003c Primary \u003c Allylic \u003c Benzylic \u003c Secondary \u003c Tertiary

Question 16

Which of the following solvents would most likely increase the rate of an $$S_N1$$ reaction for a tertiary alkyl halide?

Accepted Answer

Water

Question 17

Which of the following is a real-life application of functional groups in organic chemistry?

Accepted Answer

Determining the flavor of vanilla and clove.

Question 18

Which of the following best explains why $$S_N2$$ reactions are slower with tertiary alkyl halides?

Accepted Answer

Steric hindrance around the reacting carbon prevents nucleophilic attack.

Question 19

Which of the following is the correct IUPAC prefix for a compound containing a nitrile group?

Accepted Answer

Cyano-

Question 20

A molecule with a planar, $$sp^2-$$hybridized carbocation intermediate is undergoing which type of reaction?

Accepted Answer

$$S_N1$$ nucleophilic substitution

Functional Groups and Key Organic Reactions: Structured Study Notes

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