Question

group
2. Intense absorption band around 1700 cm-1 indicates presence of
(i) OH
(ii) CN
(iii) C=0
(iv) SH
in paion​

Answer 1

Answer:

iii)C=0

Explanation:

Absorption range is between 1690-1725. Group aldehydes,Ketone

Answer 2

Answer:

The Carbonyl group (C=O) gives a distinct band at 1700 $cm^-^1$

Explanation:

When Infrared radiation interacts with a molecule. The group present in the molecule absorbs wavelength corresponding to its stretching frequency. And in the IR spectra, a large dip can be seen at the wavelength that is absorbed.

The carbonyl group has a stretching frequency of around 1700$cm^-^1$. So an intense dip can be seen at that wavelength.