Forensic Science Chemistry Division

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Questions and Answers

Which of the following is classified as a volatile organic poison?

Nitrate

Halogenated aliphatic compounds (correct)

Sulfate

Chloride

What is an example of a non-volatile inorganic anion?

Fluoride (correct)

Acetone

Chloroform

Benzene

Which of the following non-volatile inorganic cations is included in the content?

Potassium

Sodium

Cobalt

Cadmium (correct)

Which of these is classified as an organic acidic drug?

Glutethimide Signup and view all the answers

What type of compounds do synthetic pyrethroids belong to?

Non-volatile organic neutral compounds Signup and view all the answers

Which of the following drugs is categorized as a basic drug?

Tranquilizers Signup and view all the answers

What is the purpose of the ballistic division mentioned in the content?

To examine firearms and cartridges Signup and view all the answers

Which of the following is a type of miscellaneous poison identified in the content?

Toxins of poisonous plants Signup and view all the answers

What is the primary purpose of collecting objective evidence during an investigation?

To establish linkage based on scientific examination Signup and view all the answers

Which of the following instruments is NOT mentioned as being used in chemical analyses within the Chemistry division?

NMR Spectroscopy Signup and view all the answers

Which substance is analyzed to detect narcotic drugs in forensic investigations?

Cannabis Signup and view all the answers

What type of chemical is identified for its potential to be used in acid throwing cases?

Volatile inorganic poisons Signup and view all the answers

Which narcotic substance is specifically mentioned for examination under the Chemistry division?

Morphine Signup and view all the answers

What is the primary aim of detecting inflammable materials in arson cases?

Reconstruct the crime scene Signup and view all the answers

Which of the following is NOT categorized as a psychotropic substance?

Caffeine Signup and view all the answers

The examination of various fuels in forensic science is primarily aimed at which of the following?

Linking the fuel to the crime scene Signup and view all the answers

What is one of the examinations performed to link a fired cartridge with a firearm?

Linkage of fired bullet/bullet fragments with unrifled firearm Signup and view all the answers

Which type of examination is specifically involved in identifying the type, make, and caliber of ammunition?

Examination of ammunition or parts thereof Signup and view all the answers

What type of analysis does the Physics Division conduct on building materials?

Analysis of building materials such as cement and sand Signup and view all the answers

What is tested during the chemical tests related to firearms?

Ammunition and firearm discharge residue Signup and view all the answers

Which examination is NOT part of the analysis of firearms?

Verification of model age Signup and view all the answers

What type of examination helps in cases involving hit and run incidents?

Examination of paint Signup and view all the answers

Which materials can the Physics Division analyze for identification in criminal cases?

Wires, fibers, clothes, and ropes Signup and view all the answers

What type of marks can be examined to gather forensic evidence?

Footprint and footwear marks Signup and view all the answers

Which division is responsible for the examination of biological fluids and skeletal remnants?

Biology Division Signup and view all the answers

Which of the following is NOT examined by the Documents Division?

Blood stain grouping Signup and view all the answers

What examination is performed by the DNA Unit?

Extraction and amplification of DNA Signup and view all the answers

Which type of stains does the Biology Division specifically examine?

Salivary stains Signup and view all the answers

In the Photography Division, which activity is NOT typically included?

Examination of digital images Signup and view all the answers

Which type of evidence would be examined for paternity disputes?

Biological fluids Signup and view all the answers

Which type of document is NOT likely to be examined by the Documents Division?

Blood report Signup and view all the answers

What type of biological examination involves determining the origin of species?

Identification of plant fibers Signup and view all the answers

What types of documents can be examined for alterations?

Addition, substitution, obliteration, interpolation, overwriting, erasures Signup and view all the answers

What is the primary function of the Computer Forensics Unit (CFU)?

Undertake imaging and data retrieval from storage devices Signup and view all the answers

What technique does the Forensic Psychology Division utilize to verify statements?

Polygraph examination Signup and view all the answers

Which method is NOT mentioned for data extraction within the Computer Forensics Unit?

Data retrieval from cloud storage Signup and view all the answers

Which psychological principle does forensic psychology primarily engage with?

Psychosomatic interaction Signup and view all the answers

What type of currency examination is carried out by forensic specialists?

Counterfeit currency examination Signup and view all the answers

Which of these is NOT a function of the Computer Forensics Unit?

Examining the accuracy of witness statements Signup and view all the answers

What does the Brain Electrical Oscillation Signature (BEOS) technique relate to?

Detection deception in polygraph tests Signup and view all the answers

Study Notes

Forensic Science Divisions

Chemistry Division: Analyzes chemical substances like viscera, narcotics, accelerants using high-tech instruments like LCMS, HPLC, HPTLC, GC, UV & IR Spectrophotometers.
- Narcotic Examination: Identifies opium, morphine, heroin, cannabis, cocaine, methaqualone, amphetamine, barbiturates, benzodiazepines, peyote cactus, psilocybe mushrooms, and LSD.
- Alcohol Determination: Measures ethyl alcohol content in liquor samples.
- Arson Investigation: Detects inflammable materials and their residues in arson cases and identifies dyes used in trap cases.
- Fuel Identification: Identifies various fuels like petrol, diesel, and kerosene oil.
- Corrosive Chemical Detection: Examines corrosive chemicals in acid-throwing cases.
- Reconstruction and Evaluation: Reconstructs and evaluates arson sites.
- Toxicology: Identifies volatile inorganic poisons like hydrogen cyanide, phosphine, arsine, yellow phosphorus, carbonyl chloride, and sulphonyl chloride.
- Volatile Organic Poisons: Identifies volatile organic poisons such as chloroform, benzene, formalin, methanol, ethanol, acetaldehyde, acetone, phenol, naphthalene, nicotine, toluene, terpentine oil, paraffin, halogenated aliphatic compounds, chloral hydrate, mineral oils, pyridine, aniline, ethylene dibromide, carbon tetrachloride, and petrol.
- Non-Volatile Inorganic Anions: Identifies non-volatile inorganic anions like nitrate, perchlorate, chlorate, fluoride, selenide, chloride, dichromate, bromide, phosphate, manganate, sulfate, styphnate, azide, chlorite, nitrite, and arsenate.
- Non-Volatile Inorganic Cations: Identifies non-volatile inorganic cations like Cd, Hg, Th, Ba, Pb, MN, Bi Cu, Al, Zn, Fe+2 and Fe+3.
- Non-Volatile Organic Neutral Compounds: Identifies non-volatile organic neutral compounds like chlorinated pesticides, organophosphorus insecticides, carbamates, synthetic pyrethroids, fungicides, herbicides, and plant hormones.
- Organic Acidic Drugs: Identifies organic acidic drugs like barbiturates, glutethimide, hydantoin, caffeine, phenacetin, and salicylates.
- Basic Drugs: Identifies basic drugs like benzodiazepines, alkaloids, tranquilizers, and phenothiazenes.
- Miscellaneous Poisons: Identifies miscellaneous poisons like mineral acids, alkalis, organic acids, organic insolubles, antibiotics, sulphonamides, toxins of poisonous plants, animals, and insects.

Ballistic Division

Provides facilities for firearm and cartridge examination to determine make, model, working condition, caliber, and possible links to crimes.
Helps investigate agencies with explosive cases and crime scene reconstruction.
Introduces image processing and pattern recognition unit.
Firearm Examinations:
- Barrel Wash Examination.
- Examination of Firearm(s) or part(s).
- Examination of serviceability/working condition of firearms.
- Examination of firearms prone to accidental discharge.
- Identification of firearm type, make, and model.
- Examination of firearm, whether its part(s) tempered with.
- Examination of ammunition or parts thereof/manufacturing tools.
- Identification of ammunition/parts thereof for type, make, and caliber.
- Identification of bullet/slug/parts thereof.
- Identification of shots and pellets.
- Identification of wad/wad pieces.
- Identification of propellant charge.
Linkage Analysis:
- Linkage of fired/misfired cartridge with the firearm.
- Linkage of fired bullet/bullet fragments with unrifled firearm.
- Examination of whether bullet/pellets/wads have been fired or not.
Other Examinations:
- Examination of target(s) involved in shooting.
- Chemical tests for ammunition and firearm discharge residue.
- Test firing.
- Test specimens

Physics Division

Analyzes building materials like cement, sand, mortar, plaster, concrete, bricks, etc.
Examines paint in hit-and-run cases and road accidents.
Identifies wires in theft cases, fibers, clothes, ropes, metals, and determines metal purity percentage in criminal cases using sophisticated instruments like Atomic Absorption Spectrophotometers.
Audio-Visual (A-V) Unit:
- Examines Audio and Video tapes for authentication and speaker identification.
Other Examinations:
- Examination of foot/footwear/tyre marks.
- Examination of tool marks.
- Examination of paint.
- Examination of identification marks.
- Examination of glass fragments.
- Examination of soil samples, cement samples.
- Restoration of erased numbers on vehicles/firearms (chassis number, engine number, registration number, identification numbers).
- Examination of mortar.
- Examination of concrete.
- Examination of fiber, fabric.
- Examination of broken objects.
- Examination of electrical cables/wires.
- Examination of electric appliance and electric meter.
- Examination of spurious products for infringement.
- Examination of papers.
- Examination of voice for speaker identification.
- Examination of analog/digital images.
- Examination of audio and video recording media for authentication.

Photo Division

Prepares photographs of exhibits received in the laboratory.
Photographs the scene of crime.
Examines photographs as exhibits.

Biology Division

Examines biological fluids, skeletal remnants, diatoms, hair, seeds, maggots, vegetable fibers, and wood.
Assists with rape and murder investigations.
Conducts serological examinations like blood/semen/saliva grouping and DNA typing for criminal cases and paternity disputes.
Biological Sciences Division Examination:
- Examination of blood stains.
- Examination of seminal and vaginal stains.
- Examination of salivary stains.
- Examination of hair.
- Determination of origin of species.
- Grouping of blood/other body fluids.
DNA Unit:
- Extraction, amplification, and fragment analysis of DNA for personal identification and paternity testing.

Documents Division

Examines questioned documents to identify handwriting, typewriting, printed matter, seals, and stamp impressions.
Detects and deciphers erasures, alterations, overwritings, additions, obliterations, determines sequence of strokes, age of documents, etc.
Document Forms: Examines documents like bank drafts, checks, receipts, wills, affidavits, bail bonds, lottery tickets, anonymous/ransom letters, answer sheets, suicide notes, agreements, passports, currency notes, skin tattoo marks, etc.
Computer Crime Unit: Examines computer crime cases.
Document Examinations:
- Handwriting/Signatures Identification, Detection of forgery.
- Examination of alteration in documents - addition, substitution, obliteration, interpolation, overwriting, erasures, etc., and their decipherment.
- Examination of typewriting, printed matter, computer printouts, Xerox copies, identification.
- Examination of lottery ticket.
- Examination of counterfeit currency.
- Comparison of paper including stamp paper/stamps & other security/legal papers.
- Determination of the age of the document.
- Examination of stamp impressions and seal comparison.
- Examination of sequence of strokes.
- Examination of credit cards and travel documents.
- Examination of indented writings.
- Examination of charred documents.
- Examination of carbon paper, ribbon, stencil.
- Examination of ink.
- Examination of tricky/built up documents.
- Examination of partially visible/invisible strokes on documents.

Computer Forensics Unit

Images various storage devices.
Retrieves data/deleted data from storage devices like hard drives, pen drives, memory cards, CDs/DVDs, mobile phones, and SIM cards.
Forensics Imaging:
- Forensic imaging of various storage media.
- Retrieval of data/deleted data from various storage media.
- Extraction of data from mobile phones and SIM cards.

Forensic Psychology Department

Uses psychological principles to analyze crime-related activities.
Conducts polygraph examinations based on psychosomatic interactions to investigate various charges like rape, murder, economic offenses, and cyber crimes.
Verifies the veracity of statements from suspects, complainants, and witnesses.
The department is expanding and will include other detection deception techniques like Brain Electrical Oscillation Signature (BEOS).

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Description

Explore the critical functions of the Chemistry Division in forensic science. This quiz covers narcotic examination, alcohol determination, and arson investigation, among other fascinating topics. Enhance your understanding of how forensic chemists analyze various substances critical to criminal investigations.