EXPERIMENT 7 : ALDEHYDE AND KETONE

Question 1

C=O

Answer 1

Carbonyl

Question 2

Is Oxygen more electronegative than Carbon?

Answer 2

True

Question 3

Where is Aldehyde located?

Answer 3

Terminal part

Question 4

Where is Ketone located?

Answer 4

Middle, indicates 2 R groups

Question 5

Aldehydes and some ketones are often recognizable by their _______ smells.

Answer 5

sweet

Question 6

Chanel No. 5 is expensive due to tedious process of getting ?

Answer 6

aldehyde and ketone

Question 7

vanilla flavoring

Answer 7

vanillin

Question 8

almond flavoring

Answer 8

benzaldehyde

Question 9

cinnamon flavoring

Answer 9

cinnamaldehyde

Question 10

aside from being a flavorant, vanillin is also used in?

Answer 10

parkinsons disease
hypertension

Question 11

benzaldehyde is usually seen in what species?

Answer 11

prunus

Question 12

prunus species

Answer 12

almonds, apples, peaches, cherries, apricot

Question 13

clove flavoring

Answer 13

2-Heptanone

Question 14

butter flavoring

Answer 14

Butanedione

Question 15

spearmint flavoring

Answer 15

Carvone

Question 16

primary alcohol oxidizes to ?

Answer 16

aldehyde

Question 17

secondary alcohol oxidizes to ?

Answer 17

ketone

Question 18

aldehyde can be further oxidized to carboxylic acid if?

Answer 18

the oxidizing agent is strong

Question 19

what are the catalyst in dehydrogenation of primary alcohol?

Answer 19

copper / nickel

Cu / Ni

Question 20

temperature of the catalyst Cu / Ni in dehydrogenation

Answer 20

250 - 329°C

Question 21

General preparations of aldehyde

Answer 21

• Hydrolysis of geminal dihalide
• Hydration of alkynes

Question 22

Hydrolysis of geminal dihalide is an organic reaction.

Question 23

Hydrolysis of geminak dihalide with water molecule / hydroxylic ion yields ?

Answer 23

ketone or aldehyde

Question 24

mercuric sulfate formula

Answer 24

HgSO4

Question 25

borane formula

Answer 25

BH3

Question 26

THF meaning

Answer 26

Tetrahydrofuran

Question 27

Specific preparation of aldehyde

Answer 27

Methanal Ethanal

Question 28

Oxidation of methanol

Answer 28

Methanal

Question 29

Ethanal is the oxidation of ethanol and the hydration of ?

Answer 29

Acetylene

Question 30

Net process wherein there is protonation.

Answer 30

Tautomerization

Question 31

Acetone preparations

Answer 31

Oxidation of propan-2-ol Distillation of solid Calcium acetates

Question 32

Neither aldehydes nor ketones possess the ability to H-bond with other molecules like themselves. However, they can form H-bond with ?

Answer 32

water molecule

Question 33

Boiling points for aldehydes and ketones are (higher/lower) than for alcohols of similar molar mass.

Answer 33

LOWER

Question 34

Generally the boiling point of aldehydes and ketones increases with increase in ?

Answer 34

molecular weight

Question 35

The lower members (up to 4 carbons) of aldehydes and ketones are soluble in water due to ?

Answer 35

H-bonding

Question 36

The ______ members do not dissolve in water because the hydrocarbon part is larger and resists the formation of hydrogen bonds with water molecules.

Answer 36

higher

Question 37

PCC meaning

Answer 37

pyridinium chlorochromate (mild oxidant)

Question 38

acetylene + water

Answer 38

ethanal / acetaldehyde

Question 39

ethenol is also known as?

Answer 39

vinyl alcohol

Question 40

Organic reaction without active jydrogen that undergoes redox reaction under a presence of strong base.

Answer 40

Cannizzaro Reaction

Question 41

4 Aldehydes without active Hydrogen.

Answer 41

Vanillin Benzaldehyde Siryngaldehyde Formaldehyde

Question 42

Note that most ketones and aromatic aldehydes will not react. Aliphatic aldehydes will only react. (+) red ppt (aldehyde)

Answer 42

Benedicts Test (Reduction test)

Question 43

Aldehyde + Benedicts Reagent =

Answer 43

Carboxylate Ion , RED ppt

Question 44

In Benedict's test, an aldehyde is oxidized to a carboxylic acid, while Cu2+ is reduced to give ?

Answer 44

red Cu2O(s)

Question 45

reducing carbohydrates/sugars have ?

Answer 45

aldehydes

Question 46

Reaction tests for the presence of primary alcohols, secondary alcohol and aldehyde.

Answer 46

Chromic acid test

Question 47

In chromic acid test, (+) primary or secondary alc-2-3 secs formation of __________ suspension and disappearance of ____________

Answer 47

formation of cloudy blue green disappearance of orange colored reagent

Question 48

With aliphatic aldehydes, the solution turns cloudy in about __ seconds and the blue-green suspension forms within __ seconds.

Answer 48

5 seconds, cloudy 30 seconds, blue-green

Question 49

In chromic acid test, a __________ color in either layer indicates a positive test.

Answer 49

Blue-green color

Question 50

tollen's test component

Answer 50

ammoniacal silver nitrate

Question 51

Tollens' reagent, which contains Ag+, oxidizes aldehydes but NOT ________.

Answer 51

Ketones

Question 52

In tollen's test, Ag+ is reduced to metallic Ag, which appears as a ______ in the test tube.

Answer 52

mirror

Question 53

Aldehydes and ketones containing the CH3C=O group will give a positive result with the __________ reaction.

Answer 53

triiodomethane

Question 54

Therefore, only aldehyde to give a positive result in Iodoform test is ______?

Answer 54

ETHANAL

Question 55

Result in Iodoform Test?

Answer 55

pale yellow precipitate