Chemistry-6 (What's In A Medicine?)

Question 1

Oxidation of primary alcohol and colour change

Answer 1

Primary alcohol—> aldehyde(distillation) —> carboxylate acid (reflux)

Orange to green

Question 2

Oxidation of secondary alcohols and colour change

Answer 2

Secondary alcohol—> ketones + water

Orange to green

Question 3

Oxidation of tertiary alcohols colour change

Answer 3

Don’t oxidise

Remains orange

Question 4

Ways to oxidise alcohols

Answer 4

Burn them

Add acidified potassium dichromate (VI)

Question 5

Functional group of alcohols

Answer 5

R-OH

Question 6

Functional group of aldehydes

Answer 6

R- C=O

-H

Question 7

Functional group of ketones

Answer 7

R- C=O

R’-

Question 8

Functional group of carboxylic acids

Answer 8

R- COOH

Question 9

Functional group of acid anyhydrides and suffix

Answer 9

(R- CO)2 -O

R-CO-O-CO-R

-oic anyhydride

Question 10

Functional group of esters and suffix

Answer 10

RCOOR’
R-CO-O-R’

-oate

Question 11

Functional group of ethers and suffix/prefix

Answer 11

ROR’
R-O-R’

-oxy-

Question 12

Dehydration of alcohols forms … and apparatus

Answer 12

Alkene
Ceramic wool soaked in alcohol, in side ways test tube
Pumice stone between end which is heated
Attached to test tube with water
Alkene gas released