$$\text{Degree of Unsaturation} = \frac{2C + 2 - H}{2}$$

Question 1

Which of the following best describes the difference between saturated and unsaturated hydrocarbons?

Accepted Answer

Saturated hydrocarbons contain only single bonds, while unsaturated hydrocarbons contain one or more double bonds.

Question 2

What is the correct IUPAC name for the following compound: $$CH_3CH_2CH=CH_2$?

Accepted Answer

1-Butene

Question 3

Which of the following is the correct formula for the degree of unsaturation in a hydrocarbon?

Accepted Answer

$$	ext{Degree of Unsaturation} = \frac{2C + 2 - H}{2}$$

Question 4

Which statement about alkene nomenclature is correct?

Accepted Answer

The longest carbon chain must contain the alkene functional group.

Question 5

How are stereoisomers of alkenes named according to IUPAC rules?

Accepted Answer

Using the prefixes cis/trans or (Z)/(E)

Question 6

Which of the following is an example of a nucleophile?

Accepted Answer

$$NH_3$$

Question 7

In the reaction $$CH_3CH=$$CHCH_3$$ + H_2$ \xrightarrow{Pd/C} CH_3CH_2CH_2CH_3$$, what type of reaction is occurring?

Accepted Answer

Catalytic hydrogenation

Question 8

Which of the following statements about the stability of alkenes is correct?

Accepted Answer

Trans-alkenes are generally more stable than cis-alkenes due to less steric strain.

Question 9

Which of the following best describes an electrophile?

Accepted Answer

An electron-deficient species that accepts an electron pair.

Question 10

What is the major product when 2-butene reacts with $$HBr$$?

Accepted Answer

2-bromobutane

Question 11

Which equation correctly relates the equilibrium constant $$K_{eq} to $$the standard Gibbs free energy change $$\Delta G^\circ$$?

Accepted Answer

$$\Delta G^\circ = -RT \ln K_{eq}$$

Question 12

Which of the following is true about the mechanism of electrophilic addition to alkenes?

Accepted Answer

The first step is the addition of the electrophile to the alkene.

Question 13

Which of the following best explains why more alkyl groups bonded to the sp$$^2$$ carbons of an alkene increase its stability?

Accepted Answer

Alkyl groups donate electron density through hyperconjugation and inductive effects.

Question 14

Which of the following is the correct IUPAC name for the compound shown below?

$$\mathrm{CH_2$=CHCH_2CH_2OCH_2CH_2CH_2CH_3}$$

Accepted Answer

4-pentoxy-1-butene

Question 15

Which of the following is a correct statement about thermodynamics and kinetics?

Accepted Answer

Thermodynamics determines how much product is formed at equilibrium, while kinetics determines how fast it is formed.

Question 16

Which of the following is the correct product of catalytic hydrogenation of cyclohexene?

Accepted Answer

Cyclohexane

Question 17

Which of the following is the correct structure for (E)-2-pentene?

Accepted Answer

A pentene with the two largest groups on opposite sides of the double bond.

Question 18

Which of the following is true about the reaction mechanism for $$CH_2$$=$$CH_2 + $$HBr$$?

Accepted Answer

The pi bond breaks and a new bond forms between one carbon and the hydrogen.

Question 19

Which of the following is a correct statement about exergonic and endergonic reactions?

Accepted Answer

Exergonic reactions have $$\Delta G \u003c 0$$ and release energy.

Alkene Nomenclature and Chemical Reactions: Study Notes

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