A. Which of the following molecules is NOT considered “organic”? a. CaC 2 d. NaC
ID: 1018702 • Letter: A
Question
A. Which of the following molecules is NOT considered “organic”?
a.
CaC2
d.
NaCH3(CH2)4COO
b.
CH3NH2
e.
(NH2)2CO
c.
(CH3)2O
B. When 1 mol of an alkene with one degree of unsaturation is hydrogenated, how many moles of hydrogen gas react?
a.
0 mol
d.
1.0 mol
b.
1.5 mol
e.
2.0 mol
c.
0.5 mol
C. A homopolymer is a polymer in which ________
a.
each polymer has the same mass.
b.
each polymer has the same mass and structure.
c.
the monomers are distributed uniformly throughout the polymer.
d.
the polymers are distributed uniformly throughout the solution.
e.
there is only one type of monomer unit.
D. Which of the following is/are true regarding aromatic hydrocarbons?
I.
They are particularly stable because of delocalized bonding.
II.
They are particularly stable because of their covalent network bonding.
III
They are particularly unstable, as evidenced by their tendency to evaporate.
a.
I only
d.
I and II only
b.
II only
e.
I and III only
c.
III only
E. How many structural isomers does xylene, C6H4(CH3)2, have?
a.
None—i.e., there is only 1 molecule
d.
4
b.
2
e.
5
c.
3
F. Gasoline additives such as ethanol are employed to ________
a.
decrease odor.
d.
make the fuel less volatile.
b.
promote complete combustion.
e.
increase fuel value.
c.
decrease octane rating.
G. Hexamethylene diamine, H2N(CH2)6NH2, and adipic acid, HOOC(CH2)4COOH, a dicarboxylic acid, undergo ________
a.
condensation polymerization.
b.
addition polymerization.
c.
subtraction polymerization.
d.
chiral polymerization.
e.
a combination of addition and condensation polymerization.
a.
CaC2
d.
NaCH3(CH2)4COO
b.
CH3NH2
e.
(NH2)2CO
c.
(CH3)2O
Explanation / Answer
A. a. CaC2
(inorganic carbides)
B. d. 1 mol
C. e. there is only one type of monomer unit.
D. d. I and II
(highly stable due to aromaticity which is combination of I and II)
E. c. III
( o- , m-, p- xylenes are possible)
F. e. increase fule value
actually increases the octane rating.
G. a. condensation polymerisation.
( water removes in the reaction)
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