21 Carbonyl compounds

Question 1

What are aldehydes oxidised to?

Answer 1

carboxylic acids

Question 2

Which part of a carbonyl is a nucleophile attracted to?

Answer 2

Cб+

Question 3

What does NaBH4 reduce an aldehyde to?

Answer 3

a primary alcohol

Question 4

What does NaBH4 reduce a ketone to?

Answer 4

a secondary alcohol

Question 5

Which reagent can be used to distinguish between aldehydes and ketones?

Answer 5

Tollens’ reagent

Question 6

What species acts as the nucleophile in the reaction between carbonyl compounds and NaBH4?

Answer 6

H−

Question 7

Why can carbonyl compounds react by nucleophilic addition?

Answer 7

because the C=O bond is polar

Question 8

How does the π-bond in carbonyl compounds break to form a negatively charged intermediate during nucleophilic addition?

Answer 8

heterolytic fission

Question 9

What is the suffix used when naming ketones?

Answer 9

What is the suffix used when naming ketones?

Question 10

What reagent can be used to oxidise aldehydes?

Answer 10

acidified potassium dichromate

Question 11

Can ketones be oxidised?

Answer 11

No