Practice Quiz Questions – Chapters 1 and 2

Chemistry 3B – J. Rodriguez – Reedley College

 

1.  (a) Write a Lewis Dot Structure for acetic acid, CH₃COOH.

 

(b)    What is the shape at each of the carbons in acetic acid?

 

Tetrahedral (109.5^oC), trigonal pyramidal (120^oC)

 

2. (a) Lysine is shown below and is one of the 20 amino acid building blocks of proteins.  Circle and label all of the functional groups in lysine.

 

Primary amine, primary amine, carboxylic acid

(b)    What is the molecular formula of lysine? _______________ C₆H₁₄O₂N₂________________________________

3. Draw the structural formulas for the following:

(a)    A primary alcohol with molecular formula C₅H₁₂O.

(b)    A secondary alcohol with molecular formula C₅H₁₂O.

(c)    A tertiary alcohol with molecular formula C₅H₁₂O.

 

 

4. Circle the three structural formulas that represent constitutional isomers.

 

NO                                          YES

            YES                                         YES

 

5. Write the names of these alkanes and cycloalkanes.

 

(a) 

3-isopropyl-2-methylhexane

 

(b) 

 

1-ethyl-3-propylcyclopentane

 

6. Draw line angle formulas for these alkanes and cycloalkanes.

 

(a)    trans-1,3-Dimethyl cyclopentane

 

(b)    4-Isopropyl-2-methyloctane

 

7. Dodecane, C₁₂H₂₆, is an unbranched alkane.  Predict the following:

 

(a)    Will it dissolve in water?

No

(b)    Will it dissolve in hexane?

Yes

(c)    Will it burn when ignited?

Yes

(d)    Is it a liquid, solid, or a gas at room temperature?

Liquid

(e)    Is it more or less dense than water?

Less