Question 1

Which of the following is the correct electron configuration for the atom in bold in $\mathrm{Co_2N}$?

Accepted Answer

$1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 3d^7\ 4s^2$

Question 2

Which element corresponds to the electron configuration $1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 4s^2\ 3d^{10}\ 4p^5$?

Accepted Answer

Bromine ($\mathrm{Br}$)

Question 3

Which of the following is a valid Lewis (electron-dot) structure for phosphorus pentachloride ($\mathrm{PCl_5}$)?

Accepted Answer

Phosphorus with five single bonds to chlorine atoms, each chlorine with three lone pairs

Question 4

Which of the following is the correct Kekulé structure for tetrahexane?

Accepted Answer

A straight chain of four carbon atoms with single bonds

Question 5

Given the structure below, which functional group is present outside the ring?

Accepted Answer

Alcohol

Question 6

What is the hybridization of the nitrogen atom in the following structure: $\mathrm{NH_3}$?

Accepted Answer

$sp^3$

Question 7

Which of the following is the most stable chair conformation for methylcyclohexane?

Accepted Answer

Methyl group in the equatorial position

Question 8

Which of the following is the correct Newman projection for $1,3$-dibromo-$2,4$-dichlorobutane$?$

Accepted Answer

Staggered conformation with Br and Cl anti to each other

Question 9

Which of the following is the correct IUPAC name for the structure shown below (structure with a six-membered ring, two methyl groups, and an amino group)?

Accepted Answer

2,6-dimethylcyclohexanamine

Question 10

Which of the following is the correct Fischer projection for D-glucose?

Accepted Answer

All hydroxyl groups on the right except C3

Question 11

In the reaction below, what is the major product when 2-methyl-2-butene reacts with water in the presence of $H_2SO_4$?

Accepted Answer

2-methyl-2-butanol

Question 12

Which of the following is the correct mechanism for the acid-catalyzed hydration of an alkene?

Accepted Answer

Protonation of the alkene, formation of carbocation, nucleophilic attack by water, deprotonation

Question 13

Which of the following is the correct product for the reaction of 3-methyl-1-butene with $CH_3OH$ and $H_2SO_4$?

Accepted Answer

3-methoxy-3-methylbutane

Question 14

Which of the following statements about the hybridization of carbon atoms in benzene is correct?

Accepted Answer

All carbon atoms are $sp^2$ hybridized

Question 15

Which of the following is the correct line structure for the Fischer projection shown below (with three chiral centers and an alcohol group)?

Accepted Answer

A zig-zag chain with correct stereochemistry at each chiral center

Question 16

Which of the following is the correct IUPAC name for the compound with the structure: $\mathrm{CH_3CH_2CH_2CH_2CH_2OH}$?

Accepted Answer

1-pentanol

Question 17

Which of the following is the correct mechanism for the reaction of an alkene with $Br_2$ in water?

Accepted Answer

Formation of bromonium ion, nucleophilic attack by water, deprotonation

Question 18

Which of the following is the correct product for the reaction of 1,3-butadiene with $HBr$?

Accepted Answer

1-bromo-2-butene and 3-bromo-1-butene

Question 19

Which of the following is the correct structure for 2,3-dicyclopropyl-3,5-dimethylhexane?

Accepted Answer

A hexane chain with cyclopropyl groups at C2 and C3, methyl groups at C3 and C5

Organic Chemistry I: Practice Exam 2 Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards