Gaokao Exam Chemistry: Organic Chemistry Fundamentals 2

Question 1

Which of the following is the correct IUPAC name for CH₃-CH(OH)-CH₂CH₃?

Accepted Answer

2-butanol

Answer

3-butanol

Answer

1-methylpropanol

Answer

2-methylpropan-1-ol

Question 2

Benzene reacts with bromine in the presence of FeBr₃ catalyst. What type of reaction occurs?

Accepted Answer

Electrophilic substitution

Answer

Addition reaction

Answer

Free radical substitution

Answer

Nucleophilic substitution

Question 3

What is the degree of unsaturation (DBE) of the molecular formula C₆H₆?

Accepted Answer

4

Answer

3

Answer

2

Answer

6

Question 4

Ethanol undergoes oxidation with acidified potassium dichromate (K₂Cr₂O₇/H₂SO₄). What is the primary product under controlled conditions?

Accepted Answer

Ethanal (acetaldehyde)

Answer

Ethanoic acid (acetic acid)

Answer

Ethene

Answer

Diethyl ether

Question 5

Which functional group is present in an ester?

Accepted Answer

-COO-

Answer

-CHO

Answer

-COOH

Answer

-OH

Question 6

Which statement about alkanes is correct according to the Chinese high school chemistry curriculum?

Accepted Answer

They undergo substitution reactions with halogens under UV light

Answer

They readily undergo addition reactions

Answer

They are soluble in water

Answer

They react with sodium hydroxide solution