MEDIUM
AS and A Level
IMPORTANT
Earn 100

Write a balanced equation for the oxidation of butan-2-ol to butanone, using Oto represent an oxygen atom from the oxidising agent. 

Important Questions on Carbonyl Compounds

MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 2
What do you observe in the reaction vessel if the oxidising agent i.e. potassium dichromate (VI) used in the oxidation of ethanol to ethanal reaction is acidified with dilute sulphuric acid, and the reaction mixture is heated?
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 2
The butanone does not have to be distilled off as it forms in the reaction vessel because _____.
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 3
Write a balanced equation for the reaction that takes place when proapanal is warmed with an aqueous alkaline solution of sodium tetrahydridoborate, using the symbol Hto represent a hydrogen atom from the reducing agent. 
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 3
Name the product formed in the reduction reaction if pentan-3-one is added to lithium tetrahydridoaluminate in dry ether.
MEDIUM
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 4
Name the organic product that would be formed in the nucleophilic addition of HCN to ethanal.
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 4
Name the organic product that would be formed in the nucleophilic addition of HCNto propanone.
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 4
Use diagram and curly arrows to describe the mechanism of the reaction of nucleophilic addition of HCNto ethanal.
HARD
AS and A Level
IMPORTANT
Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 18 - Carbonyl Compounds>Question>Q 5

The melting points of the derivatives of the reaction between 2,4-DNPH and various aldehydes and ketones are shown in the table. 

Describe your observations when each of the carbonyl compounds in the table is mixed with 2,4-DNPH.