Practice test 1
1. What is the total number of sigma bonds found in the following compound?
11 simga bonds
2. How many Pi bonds are in the following compund?
3 pi bonds
3. Which of the following alkanes would have the highest boiling point? A
4. The acetate ion, C2H3O2- , has both oxygens bonded to the same carbon.
a) Draw the Lewis structure and all resonance forms.
b) Label the hybridization around each carbon one has sp3, the other sp2.
c) Pick one resonance structure and label the hybridization of each oxygen. Oxygen with double
bonds is sp2, the one with a single bond is sp3
d) How many σ and π bonds are present? 1 pi bond, 6 pi bonds
e) Which atom carries the formal negative charge? Oxygen has -1 charge
8. What is the hybridization and bond angle around the indicated carbon atoms?
a.
b.
Sp2
SP
5. Draw the Lewis structure each of the following molecule
N2F4
HCN
NH(CH3)2
OH-
CH3CH2CHO
NH4+
6. Isoamylactetate is a honeybee pheromone that is released on the skin when a bee strings a
victim. This pheromone has a sweet smell and attracts other bees to join the fight. The structure
of isoamylactetate is below. What functional group does it contain?
ester
7. Luminol is a compound used by police to detect the presence of dried blood. Upon oxidation
luminal emits a green light in the presence of a metal ion such as Iron. The structure of luminal is
shown below. What functional groups does it contain
amide, anime
9. Circle the right answer
A. Ka is higher/lower for a stronger acid. pH is higher/lower for a weaker acid.
B. Lewis Acids and Bases: A/an acid/base is an electron pair donor, and a/an acid/base is an
electron pair acceptor.
C. Bronsted-Lowry Acids and Bases: A/an acid/base is a proton donor and a/an acid/base is
a proton acceptor
D. An electrophile is the a Lewis (acid/base)
9. Write a chemical equation between methyl amine (CH3NH2) and acetic acid (CH3COOH.
Label the base, acid, conjugate base, and conjugate acid.
10. Name of Draw the following molecules
H
H
4-chloro-2,4,6trimethylheptane
Trans-1-bromo-3-isopropyl-cyclopentane
H C
H
C
H
H
C H
H C
H C
C H
C
H
H Br C H
H H
1-bromo-2,3dimethylcyclohexane
2,2-dibromo-4-ethyl octane
2-methyl-3-eythl-4-isopropylnonane
cis-1,2-dichlorocyclohexane
11. Define the following terms:
Hydrophobic – molecule that are nonpolar, and don’t mix with water
Hydrophilic- molecules that are pole, and thus mix with water
12. Draw two alcohols that have the formula C3H8O
One molecule should the alcohol group on the first carbon, and the second isomer should have
the alcohol on the second carbon
13. Draw the two types of staggered and the eclipsed Newman Projections for butane. Rate these
conformations from lowest to highest energy level.
Should be three drawings, one eclipsed, and two staggered (one with the methyl groups anti and
one where the methyl group are gauche) projection
14. Which Newman projection shows the most stable conformation of the following compound?
A
15.Draw
both
chair
conformations
of
trans‐1‐ethyl‐4‐
methylcyclohexane
and
circle
the
more
stable
conformation.
Two chair structures, one where both groups are equatorial (more stable one) and the other where
both group are equatorial.
16. The structure of menthol is shown below. Draw the two chair conformations of menthol, and
tell which is more stable.
1st chair drawing, all groups are equatorial- most stable
2nd chair drawing ,all groups are axial- less stable