Questions from Crime and Investigation

Q: Which absorption spectrum is equivalent to a “fingerprint” of a

Which absorption spectrum is equivalent to a “fingerprint” of a substance and can be used for identification purposes? A) Visible B) IR C) UV D) X-ray 42) Gas chromatography suffers a big drawback...

Q: At the scene of a vehicle vandalism, fragments of soda-

At the scene of a vehicle vandalism, fragments of soda-lime glass, tempered glass, and laminated glass are found inside the vehicle. From where could these types of glass originated?

Q: Using the floatation method, three pieces of soda-lime glass

Using the floatation method, three pieces of soda-lime glass are placed in three separate cylinders containing a solution with a density of 1.67 g/mL. Glass fragment (A) floats, glass fragment (B) is...

Q: What two features make hair a good subject for establishing individual identity

What two features make hair a good subject for establishing individual identity? To which layer of the hair shaft are much of these features attributed?

Q: During a microscopic comparison of two hairs, a trace analyst compares

During a microscopic comparison of two hairs, a trace analyst compares the medullae of the hairs to determine species of origin and, if possible, human origin of the hairs. What is the difference betw...

Q: Many factors affect the intensity of drug dependence in any given individual

Many factors affect the intensity of drug dependence in any given individual. For each item of information about a drug abuser’s life given below, indicate whether the factor would likely yield a high...

Q: A newly synthesized drug, called MET, is identified by the

A newly synthesized drug, called MET, is identified by the DEA. What drug schedule should this drug be classified under, given the following established characteristics? • High potential for abuse •...

Q: An unknown white powder was located at a crime scene. Describe

An unknown white powder was located at a crime scene. Describe an analytical scheme, in proper order, to identify the drug or drugs which may be present in the powder. For each step, note whether it i...

Q: The forensic chemist received a white powder that must be identified.

The forensic chemist received a white powder that must be identified. What are the preferred analytical methods for identification of the powder’s organic components?

Q: Multiple chemical components of a mixture are separated via thin-layer

Multiple chemical components of a mixture are separated via thin-layer chromatography using silica gel as the stationary phase and ethanol and acetic acid as the mobile phase. What does the distance t...