Write notes on Aldol condensation:

Aldehydes or ketones having α -hydrogen atom react with dilute base like sodium hydroxide, its two molecules condense to form β -hydroxy aldehydes or β -hydroxy ketones. The obtained product is called aldol because it contains both aldehyde and alcohol groups and the reaction is called aldol condensation. Example:

E M B I B E

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (ix)

EASY

12th Odisha Board

IMPORTANT

Earn 100

What happens when (give equation) $HCHO$ is treated with ${NH}_{3}$ .

Important Questions on Aldehydes and Ketones

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (ix)

What happens when (give equation)

{CH}_{3} CHO

reacts with

{NH}_{2} OH

?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (ix)

What happens when (give equation) Calcium acetate is heated ?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (x)

How is acetone prepared? Give two methods. What happens when acetone reacts with Phenylhydrazine?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (x)

How is acetone prepared? Give two methods. What happens when acetone reacts with Hydroxylamine?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (x)

How is acetone prepared? Give two methods. What happens when acetone reacts with Sodium bisulphite?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (xi)

Explain with equation how aldehydes and ketones can be prepared from calcium salts of organic acids. What happens when acetaldehyde reacts with

{NH}_{2} OH

?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (xi)

Explain with equation how aldehydes and ketones can be prepared from calcium salts of organic acids. What happens when acetaldehyde reacts with phenylhydrazine?

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 18 - Aldehydes and Ketones>QUESTIONS>Q (xii)

How acetaldehyde can be prepared from the following?

(a) Acetyl chloride (b) Acetylene

How does it react with Fehling's solution? Give equations. What is formalin? How is it used?