Question

intence absorption band around 1700cm-1 indicates presence of.......group​

Answer 1

Carbonyl group

Explanation:

• The carbonyl group has a intense absorption band around 1700cm^-1.
• In chemistry, a carbonyl group is a type of functional group which contains a carbon atom and a oxygen atom and they are double bonded to each other (C = O).
• Examples of carbonyl groups are:

1. Aldehyde
2. Ketone
3. Carboxylic acid
4. Esters
5. lactones
6. lactams
7. isocyanates
8. hydroxamates
9. Amide etc.

• These compounds are insoluble in water but they dissolve some of the other forms of polar molecules.
• This absorption takes place due to stretching of C = O bond.

So, the correct answer is carbonyl group.