Chem 30B – Exam #1 (Chapter 10,11)
1.
2.
Name: __________________
Identify the following as (a) organic or (b) inorganic.
A. has a low melting point
B. is soluble in water
C. has a formula CH3─CH3
D. has a formula NaCl
E. burns easily in air
F. has ionic bonds
(a)
(b)
(a)
(b)
(a)
(b)
Identify the following as (a) alkane, (b) alkene, (c) alkyne, (d) aromatic, (e) none of the above.
O
(A)
(B)
(c)
(C)
(a)
(e)
Br
Br
(D)
(E)
(b)
3.
(d)
Which elements must be present in an organic compound?
carbon and hydrogen
4.
Explain the difference between alkane, alkene, and alkyne.
All are hydrocarbons and the difference lies in alkanes have all C-C single bonds while alkenes
have one or more C-C double bonds and alkynes have one or more C-C triple bonds.
5.
What are isomers?
Isomers are compounds that have the same molecular formula but have different structure.
6.
Identify the following reaction and draw its reaction product.
H+
+ H2O
OH
Name of the reaction: hydration
7.
Give an example (draw it out) of a hydrogenation reaction.
+ H2
8.
Pt
Draw the expanded structural formula for the following:
H
H
H
H
H
H
(a)
H
H
H
(b)
H
H
H
H
H
9.
Given the compound cis-2,3-dichloro-2-pentene
(a)
Identify the number of carbons in the main chain.
5 carbons
(b)
Identify each substituent group present and its position on the main chain.
chloro
2
chloro
3
(c)
Identify other functional group present, if any, and its position on the main chain.
alkene
2
(d)
Draw the structure of this compound
Cl
Cl
10.
Given the following compound:
(a)
Draw its expanded structure (showing all hydrogen atoms)
H
H
H
H
H
H
H
H
H
H
H
HH
H
H
H
H
H
(b)
Identify the main chain in this compound
The 8-carbon chain that contains the C-C double bond.
11.
Draw the structure of the following compounds.
(a) trans-2-pentene
Br
Br
(b) 1,1,1-tribromo-3-hexyne
Br
(c) methylcyclopentane
(d) benzene
HO
(e) phenol
I
I
(f) 2,4,6-triiodophenol
OH
I
(g) cis-5,6-dimethyl-1-octene
12.
Which of the following is/are unsaturated? Circle the correct answer(s).
Br
Br
13.
Give the IUPAC name for the five compounds shown in question 2.
(a)
3-methyl-1-pentyne
(b)
cyclooctane
(c)
2-butanone
(d)
3-heptene
(e)
1,2-dibromobenzene