Trace Evidence Analysis

Trace Evidence Analysis Quiz Crafted By-

Akhil B. Parippallil

Scientific Officer

Sherlock Institute of Forensic Science India Pvt. Ltd, New Delhi

Introduction to Trace Evidence Analysis

The field of forensic science draws from a number of scientific branches, including physics, chemistry, and biology, with its focus being on the recognition, identification, and evaluation of physical evidence. It has become an essential part of the judicial system, as it utilizes a broad spectrum of sciences to achieve information relevant to criminal and legal evidence.

Let's look at the questions and their answer. 

Ques 1. Anisotropic materials have

a) Hardness

b) Refractive Index

c) Density

d) Thickness

Answer-a) Hardness

Ques 2. Microscopic examination of paint chips from a car may include

a) Sequence of paint layers                                              

b) Colour of the paint

c) Elemental profile of paint                                             

d) Both a and b

Answer- d) All of the above

Ques 3. Fracture pattern in a glass sheet due to excessive heat will be 

a) Regular                                             

b) Irregular

c) Both regular and irregular                                                        

d) None of the above

Answer- b) Irregular

Ques 4. _____ is a regenerated fiber.

 a) Cotton

b) Rayon

c) Nylon

d) Silk

Answer-b) Rayon

Ques 5. Pyrolysis gas chromatography is useful technique for characterization of the following paint constituents:

a) Pigment                                                  

b) Binder

c) Lacquer                                                    

d) Solvent

Answer- b) Binder

Ques 6. To exclude soil samples from different sources, the comparison of colour should be carried out under:

a) Daylight                                             

b) Incandescent light

c)  Fluorescent light                                             

d) All of the above

Answer- d) All of the above

Ques 7. Besides silica, the main constituent of Gypsum soil is:

a) Calcium Carbonate                                               

b) Calcium Sulphate

c) Ferric Oxide                             

d) Aluminium Oxide

Answer-b) Calcium Sulphate

Ques 8. The main constituent of Kaolinite clay soil is: 

a) CaCO3                                                    

b) Hyrdogen Aluminium Silicate

c) MgCO3                                                      

d) Sodium Carbonate

Answer- c) MgCO3

Ques 9. Soil sample when moistened with few drops of water and the concentrated hydrochloric acid gives yellow colour due to presence of:

a) Lime                                            

b) Iron

c) Zinc                                                        

d) Aluminium

Answer- b) Iron

Ques 10. Bromoform, a high density liquid used in density gradient analysis of soil, can be replaced with:

a) Methyl Alcohol                                                  

b) Kerosene

c) Methylene Iodide                                                      

d) Xylene

Answer- c) Methylene Iodide