Question 1

Which hybridization state is associated with a carbon atom in ethyne (acetylene), and what is the bond angle between the atoms attached to this carbon?

Accepted Answer

sp hybridization, 180°

Question 2

Which of the following molecules will have the highest boiling point, and why?

Accepted Answer

Ethanol, because it can form hydrogen bonds

Question 3

What is the correct IUPAC name for the following structure: $$CH_3CH_2CH(CH_3$)CH_2CH_3$$?

Accepted Answer

2-methylpentane

Question 4

Which of the following statements about resonance structures is TRUE?

Accepted Answer

The most stable resonance structure has the least separation of charges.

Question 5

Which of the following functional groups is present in all amino acids?

Accepted Answer

Carboxylic acid

Question 6

A molecule with the formula $$C_2H_6O$$ can be either ethanol or dimethyl ether. What type of isomerism is this?

Accepted Answer

Constitutional (structural) isomerism

Question 7

Which of the following statements best explains why carboxylic acids are stronger acids than alcohols?

Accepted Answer

The conjugate base of a carboxylic acid is stabilized by resonance.

Question 8

Which of the following is a nucleophile in organic chemistry?

Accepted Answer

$$NH_3$$

Question 9

What is the correct order of boiling points for the following compounds: propane, 1-propanol, and diethyl ether?

Accepted Answer

1-propanol \u003e diethyl ether \u003e propane

Question 10

Which of the following best describes the difference between a primary, secondary, and tertiary carbon atom?

Accepted Answer

The number of carbon atoms directly attached to the carbon

Question 11

Which of the following reactions is an example of an addition reaction?

Accepted Answer

$$C_2H_4 + H_2$ \rightarrow C_2H_6$$

Question 12

Which of the following statements about aromaticity is correct?

Accepted Answer

Aromatic compounds have a continuous, cyclic cloud of delocalized $$\pi$$ electrons.

Question 13

Which of the following best explains why tertiary amines have lower boiling points than primary amines of similar molar mass?

Accepted Answer

Tertiary amines cannot form hydrogen bonds with each other.

Question 14

Which of the following is the correct systematic name for the compound with the structure below?

$$CH_3CH_2CH_2COOCH_3$$

Accepted Answer

Methyl butanoate

Question 15

Which of the following statements about the physical properties of alkanes is correct?

Accepted Answer

Alkanes are generally insoluble in water.

Question 16

Which of the following best describes the effect of an electron-withdrawing group (like $$NO_2) on $$the acidity of a carboxylic acid?

Accepted Answer

It increases the acidity by stabilizing the conjugate base.

Question 17

Which of the following is a correct statement about enantiomers?

Accepted Answer

They rotate plane-polarized light in opposite directions.

Question 18

Which of the following best describes the product of the reaction between ammonium cyanate and heat, as discovered by Friedrich Wöhler?

Accepted Answer

Urea, an organic compound

Question 19

Which of the following is a correct application of the Henderson–Hasselbalch equation?

Accepted Answer

To calculate the pH of a buffer solution given the concentrations of acid and conjugate base

Fundamentals of Organic Chemistry: Structure, Nomenclature, Properties, and Reactivity

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