org chem lab

Question 1

What is the test for unsaturation?

Answer 1

Bromic Water Test (BR2), Bayer’s Test

Question 2

What is the Test for Alcohols?

Answer 2

Lucas Test, Oxidation Test, Esterification, Chromic Acid Test, Iodoform, Acrolein Test

Question 3

What are the Test for Carbonyl?

Answer 3

2,4-dinitrophenylhydrazine, Sodium Bisulfite

Question 4

Positive result for Bromine Water Test

Answer 4

colorless product

Question 5

Positive result for Bayers Test

Answer 5

Formation of brown ppt. and decolorizes pink color or KMnO4

Question 6

Positive result for Lucas Test

Answer 6

Primary Alcohol: no change
Sec. Alcohol: Cloudy after 5 mins
Tert. Alcohol: Cloudy immediately

Question 7

Positive result for Oxidation Test

Answer 7

Primary Alcohol: Orange to Green color
Sec. Alcohol: Orange to Green color
Tert. Alcohol: No color

Question 8

Positive result for Esterification Test

Answer 8

Sweet and fruity smell

Question 9

Positive result for Chromic Acid Test

Answer 9

Orange to green color

Question 10

Positive result for Iodoform Test

Answer 10

Formation of pale yellow ppt. of iodorom or triiodomethane

Question 11

Positive result for Acrolein Test

Answer 11

Pungent odor

Question 12

Positive result for 2,4-dinitrophenylhydrazine Test

Answer 12

red-orange ppt.

Question 13

Positive result for Sodium Bisulfite Test

Answer 13

Formation of water soluble crystalline

Question 14

Positive result for Litmus Test?

Answer 14

Blue to Red litmus paper (Acidic)

Question 15

Positive result for Sodium Bicarbonate Test

Answer 15

Formation of Brisk Effervesence

Question 16

Positive result for Ester Test

Answer 16

Formation of ester or fruity smell

Question 17

Positive result for Fischer Esterification

Answer 17

Formation of fruity smell

Question 18

What is a hydrocarbon

Answer 18

Simplest organic compound

Question 19

What kind of bond does a saturated hydrocarbon have

Answer 19

Sigma bond

Question 20

What kind of bond does a unsaturated hydrocarbon have

Answer 20

At least 1 pi bond

Question 21

Will SHC react with Halogens under high temp or exposure to UV light and is inert towards HCl, H2SO4, KMnO4 and Na2Cr2O7 at room temp?

Answer 21

Yes

Question 22

What kind of reaction does USH undergo?

Answer 22

Addition

Question 23

General Formula of Alcohols?

Answer 23

ROH

Question 24

Alcohols contains what kind of group?

Answer 24

hydroxyl group (OH)

Question 25

General formula of aldehyde?

Answer 25

RCOH

Question 26

General formula of ketone?

Answer 26

RCOR

Question 27

Electron density if C and O atom in carbonyl?

Answer 27

O atom higher, C atom lower

Question 28

Is carbonyl atom susceptible to nucleophilic attack?

Answer 28

Yes

Question 29

General formula of Carboxylic acid?

Answer 29

COOH

Question 30

Carboxylic acid undergo what kind of substitution?

Answer 30

Nucleophilic

Question 31

C and O atom develops what kind of charge in a Carboxylic Acid?

Answer 31

C atom partial positive, O atom partial negative

Question 32

Amines are derivatives of?

Answer 32

Ammonia

Question 33

Name of primary amine?

Answer 33

RNH2

Question 34

Name of secondary amine?

Answer 34

R2NH

Question 35

Name of tertiary amine?

Answer 35

R3N

Question 36

Can amines be aromatic or aliphatic or both?

Answer 36

Both

Question 37

Boiling point of amines is higher than? but lower than?

Answer 37

higher than alkanes, lower than alcohols

Question 38

Which amine has the highest boiling point?

Answer 38

Primary>Secondary>Tertiary

Question 39

How many C atoms in a Amine is soluble in water

Answer 39

1-6 C atoms

Question 40

What is formed when amine is neutralized by acid?

Answer 40

Amine salts

Question 41

What are the tests for Amines?

Answer 41

Reaction with Conc. HCl Reaction w/ BR2 Hinsberg Test Reaction with HNO2 Azo Dye

Question 42

Positive result for reaction with conc. HCl

Answer 42

yellow solids

Question 43

Positive result for Reaction with Bromine Water

Answer 43

Light brown solution with white ppt.

Question 44

Positive reaction for Hinsberg Test

Answer 44

w/ aniline: solidlike actual oil ppt. w/ N methylaniline: solid ppt. insoluble w/ N,N dimethylaniline: oily ins.

Question 45

Positive result for reaction with HNO2

Answer 45

w/ aniline: rust brown solution w/ glycine: green solution