Question

A region of the IR spectrum can be used to differentiate between similar compounds that contain the same functional groups. Select the correct name of this region. O O O the downfield region the fingerprint region the functional group region the Ri region

Answer 1

A region of the IR spectrum can be used to differentiate between similar compounds that contain the same functional groups. Select the correct name of this region. O the downfield region the fingerprint region the functional group region O O the R; region

explanation:

in IR spectrum the terms Rf region and downfiled regions are not used . so we can eliminate these two options

now coming to other two

the region from   4000 cm^-1   to 1450 cm^-1    is called functional group region . in this region we can idetify different functional groups like -CHO , -COOH, -OH , -NH2 etc. these are due to strtching vibrations of molecules

but in the question it is given same functional group so we cannot identify this region

the only option is fingerprint region i.e 1450 cm^-1 to 500 cm^-1 in this region we can identify bending vibrations of same functional group molecules we can identify.