Gaokao Exam Chemistry: Organic Chemistry Fundamentals 1

Question 1

Which of the following compounds is classified as an ester?

Accepted Answer

CH₃COOCH₂CH₃

Answer

CH₃COOH

Answer

CH₃OCH₃

Answer

CH₃CH₂OH

Question 2

Propene (CH₃CH=CH₂) reacts with HBr. According to Markovnikov's rule, what is the major product?

Accepted Answer

CH₃CHBrCH₃

Answer

CH₃CH₂CH₂Br

Answer

CH₂BrCH₂CH₃

Answer

CH₃CH₂CHBr₂

Question 3

How many structural isomers does the molecular formula C₄H₁₀ represent?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 4

Which reagent can be used in the laboratory to distinguish an alkene from an alkane?

Accepted Answer

Bromine water (Br₂/H₂O)

Answer

Dilute hydrochloric acid (HCl)

Answer

Aqueous sodium hydroxide (NaOH)

Answer

Anhydrous sodium sulfate (Na₂SO₄)

Question 5

Which monomer undergoes addition polymerisation to produce the polymer polyethylene (polythene)?

Accepted Answer

Ethylene (CH₂=CH₂)

Answer

Ethanol (CH₃CH₂OH)

Answer

Ethanoic acid (CH₃COOH)

Answer

Ethane (CH₃CH₃)

Question 6

Ethanol is heated with excess concentrated H₂SO₄ at 170 °C. What is the primary organic product?

Accepted Answer

Ethylene (CH₂=CH₂)

Answer

Diethyl ether (CH₃CH₂OCH₂CH₃)

Answer

Ethyl hydrogen sulfate (CH₃CH₂OSO₃H)

Answer

Acetic acid (CH₃COOH)