Mock Test Set- 9

Q1. Which of the following techniques is most suitable for detecting latent fingerprints on porous surfaces?

   a) Iodine fuming

   b) Cyanoacrylate fuming

   c) Ninhydrin

   d) Magnetic powder

   Answer: c) Ninhydrin

   Explanation: Ninhydrin reacts with amino acids present in sweat residue, making it ideal for detecting fingerprints on porous surfaces like paper.

Q2. Which of the following is not an isotopic form of lead used in lead isotope ratio analysis?

   a) 206Pb

   b) 207Pb

   c) 208Pb

   d) 209Pb

   Answer: d) 209Pb

 Explanation: Lead has three stable isotopes: 206Pb, 207Pb, and 208Pb. 209Pb is not naturally occurring.

 Q3. The chemical structure of heroin is derived from which of the following compounds?

   a) Morphine

   b) Codeine

   c) Thebaine

   d) Papaverine

   Answer: a) Morphine

   Explanation: Heroin (diacetylmorphine) is synthesized by acetylating morphine, a natural alkaloid found in opium.

Q4. Which of the following reagents is used for detecting blood in forensic investigations?

   a) Benzidine

   b) Luminol

   c) Amido black

   d) All of the above

   Answer: d) All of the above

   Explanation: Benzidine, luminol, and amido black are all reagents used for blood detection in forensic science.

Q5. Which of the following is a low explosive?

   a) TNT

   b) RDX

   c) Black powder

   d) Nitroglycerine

   Answer: c) Black powder

   Explanation: Low explosives like black powder deflagrate, whereas high explosives such as TNT and RDX detonate.

Q6. The term "stochastic threshold" in forensic DNA analysis refers to:

   a) Minimum DNA quantity required for amplification

   b) Minimum allelic peak height for interpretation

   c) Threshold below which allelic dropout may occur

   d) Maximum peak height ratio in heterozygotes

   Answer: c) Threshold below which allelic dropout may occur

   Explanation: The stochastic threshold is used to identify where allelic dropout or imbalance in peak heights becomes significant.

Q7. Which of the following is an example of a class characteristic in tool mark analysis?

a) Striations on a bullet

b) The width of a screwdriver's blade

c) The unique wear marks on a hammer

d) The individual marks on a cut surface

Answer: b) The width of a screwdriver's blade

Explanation: Class characteristics are features that are common to a group of tools (e.g., the width or shape of a blade), whereas individual characteristics are unique and arise from wear and damage.

Q8. Which of the following techniques is primarily used in gunshot residue (GSR) analysis?

   a) Gas chromatography-mass spectrometry (GC-MS)

   b) Scanning electron microscopy-energy dispersive X-ray (SEM-EDX)

   c) High-performance liquid chromatography (HPLC)

   d) UV-visible spectrophotometry

 Answer: b) Scanning electron microscopy-energy dispersive X-ray (SEM-EDX)

 Explanation: SEM-EDX is the preferred method for GSR analysis because it can detect and visualize the elemental composition of gunshot particles.

Q9. Which principle of forensic science is illustrated when glass fractures due to a bullet are examined to determine the order of shots?

a) Locard’s Exchange Principle

b) Law of Progressive Change

c) Principle of Individuality

d) Law of Comparison

Answer: d) Law of Comparison

Explanation: The Law of Comparison helps determine the order of shots by analyzing the fracture patterns and intersections of radial and concentric fractures on glass surfaces.

Q10. The examination of bullet trajectory is crucial in crime scene reconstruction. Which of the following methods is commonly used to reconstruct the bullet path?

a) String method

b) Photogrammetry

c) Laser trajectory kit

d) Ballistic gel analysis

Answer: c) Laser trajectory kit

Explanation: A laser trajectory kit allows investigators to project the probable path of a bullet by aligning the laser beam with entry and exit wounds or other bullet impacts at the crime scene

Content Writer:- Srishti Dutta