NTA-NET (Based on NTA-UGC) Forensic Science (Paper-II): Questions 1 of 599

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» Instrumental Analysis » X- Ray Spectroscopy

Appeared in Year: 2008

MCQ▾

Question

Fingerprint region of the Infrared spectra lies between: (June)

Choices

Choice (4) Response

a.

4.3 - 6.3 m

b.

2.3 - 5.3 microns

c.

6.6 - 14 m

d.

3.7 - 5.4 microns

Analysis

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Answer

c.

Explanation

The region below 1500cm-1 is called fingerprint region, to be precise 1400 - 700 cm-1 . It is used to characterize as molecular fingerprints, which detect presence of functional groups in a compound. Just like fingerprints, no two compound can have the same IR pattern, and hence it is called as fingerprint region.

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