CHAPTER 20(1)

Question 1

Ethers are formed by the combination of two _____________ molecules in a ______________reaction.

alcohols, dehydration

ketones, dehydration

aldehydes, dehydration

alcohols, hydration

Answer 1

alcohols, dehydration

Question 2

Consider the following molecule:

The IUPAC name of this molecule is __________ and the class of compounds to which it belongs is the ______________.

methoxyethane, ethers

ethylmethanol, ethers

methoxyethane, hydroxys

methoxyethane, alcohols

Answer 2

methoxyethane, ethers

Question 3

Alcohols can be produced by the addition of __________ to a carbon-carbon ________ bond.

water, double

water, single

OH-, double

hydrogen, double

Answer 3

water, double

Question 4

Aromatic hydrocarbons are unusually stable because:

mobile Pi bonds forming a resonance structure.

mobile sigma bonds forming a resonance structure.

they smell.

they are circular.

Answer 4

mobile Pi bonds forming a resonance structure.

Question 5

Bromination addition to ethyne would most likely result in:

dibromoethane

tetrabromoethane

bromoethyne

bromoethane

Answer 5

tetrabromoethane

Question 6

Two of the main types of reactions involving alkanes are:

oxidation and halo-substitution

oxidation and halo-addition

hydro-halogenation and halo-substitution

halo-addition and halo-substitution

Answer 6

oxidation and halo-substitution

Question 7

Consider the following reaction and indicate which reaction type it corresponds to.

addition

polymerisation

alkane reduction

substitution

Answer 7

substitution

Question 8

Which of the following statements about geometrical isomers of alkenes is generally true?

none of these

Cis isomers are more bent than trans isomers. Trans isomers stack better resulting in higher melting points.

Trans isomers are more bent than cis isomers. Trans isomers stack better resulting in higher melting points.

Cis isomers are more bent than trans isomers. Trans isomers stack poorly, resulting in higher melting points.

Answer 8

Cis isomers are more bent than trans isomers. Trans isomers stack better resulting in higher melting points.

Question 9

The isomers depicted below would be respectively referred to as:

D, L

trans, cis

cis, trans

none of these

Answer 9

cis, trans

Question 10

Ethylene a(n) _____________molecule can be polymerised to polyethylene, a(n) ___________ polymer.

saturated, unsaturated

saturated, saturated

unsaturated, saturated

unsaturated, unsaturated

Answer 10

unsaturated, saturated

Question 11

“Saturation” in organic chemistry refers to carbon atoms that are saturated with:

fat.

hydrogen.

water and hydrogen.

water.

Answer 11

hydrogen.

Question 12

Hydrocarbons that are unsaturated include:

alkynes only.

alkanes, alkenes and alkynes.

alkenes only.

alkenes and alkynes.

Answer 12

alkenes and alkynes.

Question 13

A seven carbon unbranched alkane would be called and have the molecular formula:

hextane, C7H7

heptane, C7H14

heptane, C7H16

hexane, C7H16

Answer 13

heptane, C7H16

Question 14

A saturated hydrocarbon (alkane) has the general molecular formula:

CnH2n+2

CnHn

CnH2n

CH

Answer 14

CnH2n+2