Quiz on Forensic Chemistry and Toxicology

1. Which of the following techniques is most commonly used for drug analysis in forensic chemistry?

UV-Visible Spectroscopy Gas Chromatography-Mass Spectrometry (GC-MS) Atomic Absorption Spectroscopy Paper Chromatography

2. What is the purpose of a presumptive test in forensic chemistry?

To confirm the identity of a substance To provide an initial indication of a substance’s presence To calculate the concentration of a drug To rule out all other substances

3. Which type of explosive contains nitroglycerin as its main ingredient?

Dynamite TNT RDX ANFO

4. What is the primary purpose of forensic chemistry in arson investigations?

To identify the accelerant used To determine the cause of the fire To collect fingerprints from the scene To establish a motive for the arson

5. Which reagent is used to detect bloodstains in forensic analysis?

Benedict’s solution Luminol Nessler’s reagent Dragendorff’s reagent

6. What does FTIR stand for in forensic analysis?

Fourier Transform Infrared Spectroscopy Fast Thermal Ionization Reaction Forensic Toxicology Infrared Recognition Fourier Transmission Image Reconstruction

7. Which of the following is an indicator of a methanol-based poisoning?

Blindness Cyanosis Hyperactivity Jaundice

8. In forensic chemistry, what is the primary use of Thin-Layer Chromatography (TLC)?

Determining molecular weight Identifying and separating compounds Determining combustion rate Confirming elemental composition

9. What is the function of a mass spectrometer in forensic analysis?

To identify elements based on atomic weight To measure the mass-to-charge ratio of ions To detect fingerprints To visualize DNA fragments

10. The Becke line method is used to determine the:

Density of a material Index of refraction of glass Hardness of a metal Molecular structure of a compound

11. What is the primary goal of forensic toxicology?

To identify drugs in biological samples To identify the source of contamination To calculate the amount of alcohol consumed To determine the color of a toxin

12. Which organ is primarily used to detect poison in post-mortem toxicology?

Liver Heart Brain Pancreas

13. Which toxic substance is detected using the Marsh test?

Arsenic Cyanide Lead Mercury

14. Alcohol concentration in blood is primarily measured by:

Gas Chromatography Atomic Absorption Mass Spectrometry Ultraviolet Spectroscopy

15. What is the primary metabolite of ethanol in the human body?

Methanol Acetaldehyde Formaldehyde Acetone

16. What is the term for a substance that neutralizes the effects of a poison?

Toxin Antidote Catalyst Inhibitor

17. Which poison smells like bitter almonds?

Arsenic Cyanide Strychnine Methanol

18. Which test is used to detect organophosphates in forensic toxicology?

Gutzeit Test Ellman’s Test Reinsch Test Kastle-Meyer Test

19. In forensic toxicology, LD50 refers to:

The amount of a substance that causes death in 50% of a test population The concentration of a toxin in the blood The latency duration of a toxin The life duration of the toxin in tissue

20. Which of the following is a neurotoxin?

Lead Carbon monoxide Botulinum toxin Cyanide

21. Which of the following is commonly used to detect cyanide poisoning?

Reinsch Test Sodium Nitroprusside Test Prussian Blue Test Dragendorff’s Reagent Test

22. The Widmark formula is used for:

Estimating blood alcohol content Calculating lethal dose of toxins Analyzing drug metabolites Identifying poison in tissues

23. Which of these poisons causes cherry red discoloration of blood?

Cyanide Carbon monoxide Methanol Lead

24. Strychnine poisoning is characterized by:

Severe muscle spasms Cardiac arrest Skin discoloration Blindness

25. Which test is used for the detection of barbiturates?

Marquis Test Dille-Koppanyi Test Scott Test Kastle-Meyer Test

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