Question

Occult fingerprints are made visible by the use of __________ Which turns purple?
A.Cyno acrylate
B.Potassium di-chromate
C.Nin-hydrin
D.Silver nitrate
Which is correct answer?​

Answer 1

Occult fingerprints are sometimes made visible by the use of ninhydrin , which turns purple due to reaction with amino acids present in perspiration. Fingerprints or other marks are also sometimes made visible by exposure to high-powered laser light !

Answer 2

Answer:

nin-hydrin

Explanation:

this is an important question