Oxidation of Alcohols

Question 1

what is the oxidising agent used in the oxidation of alcohols

Answer 1

potassium dichromate(VI)
K2Cr2O7

Question 2

what is the colour change of the oxidation of alcohols

Answer 2

orange (Cr2O7 2-) dichromate (VI) ion
TO
green( Cr3+) chromium (III) ion

Question 3

what are primary alcohols oxidised to

then what is that thing oxidised to

Answer 3

aldehyde
then FURTHER OXIDISED
to a carboxylic acid

Question 4

what are secondary alcohols oxidised to

Answer 4

Ketones

Question 5

what are tertiary alcohols oxidised to

Answer 5

THEY ARE NOT OXIDISEDDDDDDD

Question 6

what is the functional group of an aldehyde, ketone, carboxylic acid

Answer 6

C=O

Question 7

what is the general formula of an aldehyde and ketone

Answer 7

CnH2nO

Question 8

what is the general formula of a carboxylic acid

Answer 8

CnH2n+1COOH

Question 9

for aldehyde on what carbon is the functional group on ALWAYS

Answer 9

1st carbon

Question 10

what are the oxidising agents used to DISTINGUISH between aldehydes and ketones

Answer 10

Fehling’s solution

tollens reagent

Question 11

Fehling’s solution(Cu2+)

Answer 11

Fehling’s solution and benedict’s solution are both blue (CU2+)
which turn brick red when reduced (Cu2O) when warmed with an aldehyde, but STAYS blue with ketone

Question 12

Tollens reagent [Ag(NH3)2]+

Answer 12

REDUCED to silver when warmed with an aldehyde
BUT not with a ketone.
the silver coats in the inside of the apparatus forming a silver mirror