10-minute Quiz : Ch42 Introduction to selected homologous series

Cholesterol has a molecular formula of C₂₇H₄₆O and has the structure as shown in the diagram. How many carbon atoms are there in the alkyl group R?

• A. 7
• B. 8
• C. 9
• D. 10

Which of the chemical formula for 1-fluoro-3-methylbut-2-ene is correct?

• A
• B
• C
• D

Which of the following correctly arranges three alcohols, with the same molecular formula C₅H₁₂O, in decreasing order of boiling point?

• A. 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol
• B. 2-methylbutan-2-ol > pentan-1-ol > 3-methylbutan-2-ol
• C. pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol
• D. 3-methylbutan-2-ol > 2-methylbutan-2-ol > pentan-1-ol

An acyclic hydrocarbon has four carbon atoms. Given that it is an alkene, what is its molecular formula?

• A. C₄H₁₀
• B. C₄H₈
• C. C₄H₆
• D. C₄H₄

What is the systematic name of the compound as shown?

• A. Pent-2-enal
• B. Pent-3-enal
• C. Pentan-2-enal
• D. Pentan-2-en-5-al

What is the systematic name of the compound as shown?

• A. 4-methylheptane-2,6-dione
• B. 3-methylpentane-1,5-dione
• C. Methylheptane-2,6-dione
• D. Methylpentane-1,5-dione

What is the systematic name of (CH₃)₂CHCHClCOOH?

• A. Dimethyl-2-chloropropanoic acid
• B. 1-chloro-2,2-dimethylpropanoic acid
• C. 3-methyl-2-chlorobutanoic acid
• D. 2-chloro-3-methylbutanoic acid

A carbon compound has the molecular formula C₃H₆O₂. It has a pleasant fruity smell and its aqueous solution does not turn blue litmus paper red. Which of the compounds may it be?

• A. (1) only
• B. (2) only
• C. (1) and (3) only
• D. (2) and (3) only

What is the structural formula of 2-methylbutan-1-amine?

• A
• B
• C
• D

Consider the two carbon compounds X and Y as shown. Which of the following statements about these compounds is/are correct?

(1) X can be derived from Y.

(2) X boils at a lower temperature than Y at atmospheric pressure.

(3) X is insoluble in water while Y is soluble.

• A. (1) only
• B. (2) only
• C. (1) and (3) only
• D. (2) and (3) only