EXPERIMENT 7 IDENTIFICATION OF PHENOLS AND ALCOHOLS

Question 1

Specific groups of atoms in an organic molecule can determine its physical and chemical properties

Answer 1

FUNCTIONAL GROUPS

Question 2

hydrocarbons, which contain the functional group -OH, the hydroxyl group, are called

Answer 2

ALCOHOLS

Question 3

Most widely used alcohols are

Answer 3

METHANOL OR METHYL ALCOHOL, ETHANOL OR ETHYL ALCOHOL, 2-PROPANOL OR ISOPROPYL ALCOHOL

Question 4

STRUCTURAL FORMULA OF METHANOL

Answer 4

CH3OH

Question 5

STRUCTURAL FORMULA OF ETHANOL

Answer 5

CH3CH2OH

Question 6

STRUCTURAL FORMULA OF 2-PROPANOL OR ISOPROPYL ALCOHOL

Answer 6

(CH3)2CHOH

Question 7

found in automotive products such as antifreeze and “dry gas”

Answer 7

METHYL ALCOHOL

Question 8

solvent for drugs and chemicals; alcoholic beverages

Answer 8

ETHYL ALCOHOL

Question 9

rubbing alcohol or antiseptic

Answer 9

ISOPROPYL ALCOHOL

Question 10

(TRUE/FALSE) Phenols tend to be more acidic than alcohols.

Answer 10

TRUE

Question 11

(TRUE/FALSE) Concentrated solutions of the compound alcohol are quite toxic and can cause severe skin burns.

Answer 11

FALSE (phenol)

Question 12

Phenol derivative that is used to kill fungi and hookworms

Answer 12

THYMOL

Question 13

solvents for paints, shellacs and varnishes

Answer 13

METHANOL

Question 14

solvents for paints, shellacs and varnishes

Answer 14

METHANOL

Question 15

alcoholic beverages; solvent for medicines, perfumes

Answer 15

ETHANOL

Question 16

astringent; for cosmetics and skin creams

Answer 16

ISOPROPYL ALCOHOL

Question 17

antifreeze

Answer 17

ETHYLENE GLYCOL

Question 18

sweetening agent; solvent for medicine lubricant; moistening agent

Answer 18

GLYCEROL (GLYCERIN)

Question 19

antiseptic; clean surgical and medical instruments

Answer 19

PHENOL (CARBOLIC ACID)

Question 20

flavoring agent (vanilla)

Answer 20

VANILLIN

Question 21

irritant in poison ivy

Answer 21

TETRAHYDROURUSHIOL

Question 22

(TRUE/FALSE) Compounds containing hydroxyl group are polar, such as alcohols and phenols

Answer 22

TRUE

Question 23

(TRUE/FALSE) The polarity of the hydroxyl group, coupled with its ability to form hydrogen bonds, enable alcohols and phenols to mix with water.

Answer 23

TRUE

Question 24

a mixture of zinc chloride (ZnCl2)

Answer 24

LUCAS REAGENT

Question 25

Alcohols react with Lucas reagent, in concentrated HCl to form

Answer 25

ALKYL CHLORIDES

Question 26

(TRUE/FALSE) Alkyl chlorides are soluble.

Answer 26

FALSE (INSOLUBLE)

Question 27

a test used to distinguish between primary, secondary, and tertiary alcohols since this reaction takes place with different rates depending on the class of the alcohol

Answer 27

LUCAS TEST

Question 28

Upon the addition of Lucas reagent, a ______________ reacts rapidly and gives an insoluble white layer within 5 minutes

Answer 28

TERTIARY ALCOHOL

Question 29

reacts slowly and gives the white layer within 20 to 30 minutes, usually with slight heating

Answer 29

SECONDARY ALCOHOL

Question 30

No reaction upon the addition of Lucas reagent

Answer 30

PRIMARY ALCOHOL

Question 31

(TRUE/FALSE) Any formation of a heterogenous phase or appearance of an emulsion is a negative test.

Answer 31

FALSE (POSITIVE TEST)

Question 32

a strong oxidizing agent and can oxidize primary and secondary alcohols

Answer 32

CHROMIC ACID

Question 33

This test enables to distinguish primary and secondary alcohols from tertiary alcohols

Answer 33

CHROMIC ACID TEST

Question 34

primary alcohols are oxidized to carboxylic acids using

Answer 34

ACIDIFIED DICHROMATE SOLUTION

Question 35

Secondary alcohols are oxidized to

Answer 35

KETONES

Question 36

(TRUE/FALSE) In chromic acid test, tertiary alcohols are not oxidized.

Answer 36

TRUE

Question 37

(TRUE/FALSE) In the oxidation, the brown-red color of chromic acid changes to a blue-green solution.

Answer 37

TRUE

Question 38

Only ethyl alcohol and alcohols with the part structure CH3CH(OH) react. These alcohols react with iodine in aqueous sodium hydroxide to give the yellow precipitate iodoform.

Answer 38

IODOFROM TEST

Question 39

Phenol is also called __________

Answer 39

CARBOLIC ACID

Question 40

phenol is an acid and it reacts with base

Answer 40

ACIDITY OF PHENOL

Question 41

Addition of aqueous ferric chloride to a phenol gives a colored solution.

Answer 41

FERRIC CHLORIDE TEST

Question 42

(TRUE/FALSE) Depending on the structure of the phenol, the color can vary from yellow to purple.

Answer 42

FALSE (green to purple)

Question 43

enumerate the substances involved in experiment 7

Answer 43

1-butanol, 2-butanol, t-butyl, phenol and unknown

Question 44

(TRUE/FALSE) A purple color in Ferric chloride test indicates the presence of a phenol.

Answer 44

TRUE

Question 45

Tests involved in testing the Chemical Properties of alcohols and phenols

Answer 45

LUCAS TEST, CHROMIC ACID TEST, IODOFORM TEST, FERRIC CHLORIDE TEST