2 Chem questions please help fast :(

Question

 1) A single specific test for identification is: 
a. Infrared spectrophotometry 
b. Ultraviolet spectrophotometry 
c. Gas chromatography 
d. Thin-layer chromatography 
e. Microcrystal tests 

2) A comparison analysis subjects a suspect specimen and a control specimen to the same tests and examinations for the ultimate purpose of determining: 
a. Whether or not they have a common origin 
b. If they are identical in chemical composition 
c. If the same person handled them 
d. If they are alike in molecular structure 
e. All of the above

Answer 1

Step 1:

(1)

The single specific test for identification of drug is Infrared spectophotometry.

Infrared spectophotometry is the analysis of infrared light interacting with a molecule.

This can be analyzed in three ways by measuring absorption, emission and reflection.

Molecules absorb infrared radiation and produce absorption bands which determines the characteristics of the molecule.

infra-red absorption bands produced give very characteristic spectra, ensuring good selectivity and capable of identifying a pure compound in almost all cases.

Pattern are unique for each drug. So it is easy to identify the drug.

The specific single test for identification is Infrared spectophotometry.

Option (a) is the correct answer.

Solution:

Option (a) is the correct answer.

Answer 2

 

 

 

(2)

Step 1:

Comparison analysis subject  examines the physical evidence by a forensic scientist.

Comparison:  The process of ascertaining whether two or more objects have a common origin.

A comparison analysis subjects a suspect specimen and a standard/reference specimen to the same tests and examinations for the ultimate purpose of determining whether they have a common origin.

Let us Consider the following example to have a clear idea.

1) Hair found at a scene to hair from a suspect.
2) A paint chip found at a scene with the paint from a suspect vehicle.

So option (a) is the correct choice.

Solution:

Option (a) is the correct choice.