
Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give:
A. tertiary alcohols
B. secondary alcohols
C. primary alcohols
D. carboxylic acids
Answer
441k+ views
Hint: Aldehyde reacts with Grignard’s reagent to give organometallic compounds. Which on further hydrolysis gives alcohols. Grignard’s reagent is magnesium alkyl halide, which is formed when alkyl halide is reacted with magnesium.
Complete answer:
- We will take an aldehyde like acetaldehyde and react it with Grignard reagent then it will give additional products, which on hydrolysis will give secondary alcohol. We can see the reaction:
- If we take an Aldehyde like acetaldehyde and when it reacts with Grignard’s reagent (that is an alkyl halide mixed with Mg). We can see that the carbonyl carbon of acetaldehyde is having positive charge and the oxygen is having negative charge.
- When it is attacked with Grignard reagent, at that time it will push the double bond between carbon and oxygen to become a lone pair around the oxygen, and we get the product along with Mg-Halide.
- In the next step the products are mixed up with some aqueous acid and we get a secondary alcohol as our main product.
Hence, we can conclude that option (B) is correct, that aldehydes other than formaldehyde react with Grignard’s reagent to give additional products which on hydrolysis give secondary alcohols.
Note:
- All the aldehydes except formaldehyde when reacted with Grignard’s reagent will give secondary alcohol. Formaldehyde will give primary alcohol.
- Ketones also react with Grignard’s reagent to give alcohol.
Complete answer:
- We will take an aldehyde like acetaldehyde and react it with Grignard reagent then it will give additional products, which on hydrolysis will give secondary alcohol. We can see the reaction:

- If we take an Aldehyde like acetaldehyde and when it reacts with Grignard’s reagent (that is an alkyl halide mixed with Mg). We can see that the carbonyl carbon of acetaldehyde is having positive charge and the oxygen is having negative charge.
- When it is attacked with Grignard reagent, at that time it will push the double bond between carbon and oxygen to become a lone pair around the oxygen, and we get the product along with Mg-Halide.
- In the next step the products are mixed up with some aqueous acid and we get a secondary alcohol as our main product.
Hence, we can conclude that option (B) is correct, that aldehydes other than formaldehyde react with Grignard’s reagent to give additional products which on hydrolysis give secondary alcohols.
Note:
- All the aldehydes except formaldehyde when reacted with Grignard’s reagent will give secondary alcohol. Formaldehyde will give primary alcohol.
- Ketones also react with Grignard’s reagent to give alcohol.
Recently Updated Pages
Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Chemistry: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Class 11 Question and Answer - Your Ultimate Solutions Guide

Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Trending doubts
Explain why it is said like that Mock drill is use class 11 social science CBSE

Which of the following blood vessels in the circulatory class 11 biology CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

Which one is a true fish A Jellyfish B Starfish C Dogfish class 11 biology CBSE
