A) Documenting the result and preserving the sample for court evidence. B) Administering treatment to the victim. C) Reporting the result to the police only. D) Immediately publishing the findings in a scientific journal.
A) To calculate the concentration of the chemical. B) To identify the color and odor characteristics. C) To identify the toxic effect. D) To determine the source and legal admissibility of the evidence
A) Cross-reference the substance with controlled substances schedules. B) Conduct the test and discard the sample. C) Only notify the laboratory manager. D) Test only for lethal chemicals.
A) Following validated protocols and maintaining chain of custody B) Using the cheapest and fastest analytical method. C) Testing only for common poisons. D) Allowing multiple technicians to randomly alter procedures.
A) Trace chemicals may suggest exposure but must be corroborated with other evidence. B) Trace chemicals can be reported without documentation. C) Trace chemicals are irrelevant unless in large amounts. D) Trace chemicals prove guilt without further context.
A) Forensic toxicology is like a laboratory technician cleaning samples. B) Forensic toxicology is like a translator between chemical evidence and legal interpretation C) Forensic toxicology is like a detective mapping crime scenes. D) Forensic toxicology is like a police interrogator asking questions.
A) Immediately reporting findings, preserving evidence, and documenting the analysis. B) Conducting personal experiments to verify toxicity. C) Informing the media before law enforcement. D) Neutralizing the cyanide and discarding the sample.
A) Recording results in an official laboratory report. B) Maintaining a detailed chain of custody for samples. C) Altering test results to fit the expected outcome. D) Using validated analytical methods for controlled substances.
A) Identification is based on reproducible analytical methods and peer-reviewed techniques. B) Only visual observation is sufficient. C) Results should be accepted without documentation. D) Confidence is irrelevant; results are always taken as truth.
A) Comparing molecular structure, toxicity, and legal classification. B) Ignoring its potential effects because it’s a new compound. C) Reporting the substance as legal if it is not listed in the old law D) Only checking if the color matches.
A) Residues always prove guilt directly. B) Residues are only useful for academic studies. C) Residues are like dust, always irrelevant. D) Residues are like fingerprints—they may link a suspect to a crime scene.
A) How can the concentration of the poison relate to the victim’s cause of death? B) Can the poison be replaced with another chemical for convenience? C) What is the cheapest method to detect the poison? D) Should the victim be ignored if symptoms are mild?
A) Report the substance as illegal everywhere. B) Proceed without concern for jurisdictional laws. C) Document the finding and consult legal authorities on jurisdiction-specific legislation. D) Ignore the legal classification and focus solely on chemistry
A) It only tracks the sample’s weight. B) It allows multiple labs to change the sample freely. C) It guarantees that evidence results are admissible and reliable in court. D) It ensures that evidence is analyzed quickly.
A) Only focusing on the chemical with the highest concentration B) Integrating chemical identification, dosage, metabolism, and legal implications to interpret the outcome C) Assuming all compounds were administered intentionally D) Listing the chemicals without relating to cause of death
A) Locard’s exchange principle B) Chain of custody C) Principle of individuality D) Principle of contamination control
A) Authentication under Rules of Evidence B) Preservation of corpus delicti C) Scientific reliability of the method D) Admissibility of expert opinion
A) Tracing drug metabolites in human urine B) Establishing a direct cause of death C) Determining the lethal dose of poison D) Identifying the antidote for ingestion
A) It affects the credibility but not admissibility of evidence B) It constitutes a violation of procedural due process C) It invalidates the chain of custody automatically D) It renders the evidence inadmissible due to lack of authentication
A) Establishing guilt beyond reasonable doubt through confession B) Substituting eyewitness testimony with expert interpretation C) Reconstructing crime scenes solely by chemical analysis D) Scientifically linking physical evidence to legal elements of a crime
A) To teach chemistry to law enforcement personnel B) To regulate the sale of chemicals to the public C) To analyze chemical evidence to assist in legal investigations D) To develop new chemical compounds for industrial use
A) Calculating the volume of a liquid found at a crime scene B) Determining the exact concentration of a drug in a blood sample C) Measuring the pH of a soil sample D) Identifying the type of explosive used in a bombing
A) The sequence of chemical reactions used to identify a substance B) The list of ingredients in a chemical compound C) The documented history of the handling and storage of evidence. The order in which witnesses are called to testify in court
A) Distillation B) Titration C) Polymerase Chain Reaction (PCR) D) Mass Spectrometry
A) To assess the potential effects of a substance based on the amount present in the body B) To understand how different drugs interact with each other C) To identify the source of a drug or poison D) To determine the legal penalties for drug possession
A) Only perform a confirmatory test without preliminary screening B) Ignore the stain because it might be from food C) Conduct preliminary color tests followed by confirmatory tests to verify the presence of blood D) Immediately report it as blood based on color alone
A) Preliminary tests are optional; confirmatory tests are enough B) Preliminary tests alone are sufficient for legal reporting C) They allow rapid screening to prioritize samples while reducing risk of false positives D) They provide definitive identification without confirmatory analysis
A) Only microscopic comparison without DNA testing B) DNA analysis first, then discard microscopic examination C) Report the hair as human without further testing D) Microscopy for morphological assessment (preliminary) and DNA analysis (confirmatory)
A) Only noting solubility in water B) Relying solely on odor or visual appearance C) Performing a simple colorimetric test only D) Using GC-MS or IR spectroscopy after preliminary reagent tests
A) Preliminary tests are the final verdict; confirmatory tests are optional B) Preliminary tests are like a screening metal detector, and confirmatory tests are like x-ray scanning to verify the object C) Preliminary tests and confirmatory tests are identical D) Confirmatory tests are only for decorative purposes
A) Report it as linked to a victim immediately B) Compare only color under a microscope C) Use preliminary microscopic characteristics and confirm with FTIR or microchemical analysis. D) Only perform chemical solubility tests
A) Validation is unnecessary for trace evidence B) Preliminary tests are always accurate and need no validation C) Preliminary tests can replace confirmatory tests for efficiency
A) Record the color reaction as the final result B) Conclude it is human blood C) Conduct a confirmatory test such as Takayama or immunoassay to verify. D) Discard the sample because preliminary tests are sufficient
A) Conducting GC-MS on suspected controlled substances B) Reporting preliminary color test results as conclusive identification without confirmatory evidence. C) Confirming trace fibers using micro-FTIR D) Using DNA testing to confirm human biological material
A) Conduct preliminary reagent tests for common substances, then confirm with spectroscopy or chromatography B) Immediately report it as a drug solution based on smell C) Rely solely on color to identify the substance D) Perform only a solubility test
A) First performing chemical spot tests, then confirming with SEM-EDX particle analysis B) Using only SEM-EDX for identification C) Relying on the victim’s testimony D) Only noting the firearm type at the scene
A) Preliminary tests alone are sufficient for legal reporting B) Both tests provide complementary information, reducing false positives and ensuring admissibility C) Confirmatory tests are unnecessary if preliminary tests are positive D) Trace evidence is rarely important in court
A) Use only a microscope to identify blood cells B) Test the stain with phenolphthalein (preliminary), then perform Takayama (confirmatory) C) Ignore the stain because it may be paint D) Report the stain as blood based on color
A) Confirmatory tests are optional decorations in the laboratory B) Confirmatory tests are performed randomly for fun C) Confirmatory tests always replace preliminary tests D) Confirmatory tests are like a referee confirming a goal after video replay
A) Only measure the paint thickness B) Assume the paint belongs to the suspect car without testing C) Compare only color to the suspect vehicle D) Conduct preliminary microscopic and chemical characterization, followed by confirmatory spectroscopy (FTIR or Raman)
A) ABAcard HemaTrace test B) Teichmann test C) Takayama crystal test D) Benzidine test
A) Thin Layer Chromatography (TLC) B) Gas Chromatography-Mass Spectrometry (GC–MS) C) Ultraviolet spectroscopy D) Colorimetric comparison test
A) Medullary index measurement B) Cuticle scale pattern analysis C) Microscopic pigmentation test D) Mitochondrial DNA analysis
A) Contact with agricultural fertilizer B) The suspect handled explosives recently C) Exposure to organic solvents D) Gunpowder residue deposition
A) Specificity limitation B) Reproducibility C) Chain of custody D) Sensitivity
A) Microscopic examination for spermatozoa B) Saliva test C) Acid phosphatase test D) Amylase test
A) Gas Chromatography-Mass Spectrometry (GC-MS) B) Microscopic examination C) Thin Layer Chromatography (TLC) D) Melting point determination
A) Burning test B) Infrared Spectroscopy C) Solubility test D) Microscopic examination of colour and texture
A) Maybe, depend on the experience of the examiner B) Yes, a negative presumptive test rules out the presence of blood C) No, a negative presumptive test does not completely rule out the presence of blood; further testing may be required D) Yes, if the examiner is very sure about the result
A) Griess test B) Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS) C) Luminol test D) Sodium rhodizonate test
A) Mix the blood with ethanol and store in a sealed container B) Scrape the blood into a plastic bag and store at room temperature C) Wash the blood with distilled water and then freeze the residue D) Use a sterile swab to collect the blood, allow it to air dry, and place it in a paper envelope
A) Wash the hair before storage to remove potential contaminants B) Use tweezers to handle the hair and store it in a paper envelope C) A.Comb the clothing thoroughly with a metal comb D) Place the hair in a sealed plastic bag to prevent contamination
A) Wash the fabric in cold water to prevent bacterial growth B) Air dry the fabric and store in a breathable container C) Freeze the fabric immediately without drying D) Place the fabric in a plastic bag while still wet
A) Dissolve in water for transport B) Wrap in paper and store in a cool, dry place C) Mix with other drug samples to save space D) Place directly in a sealed plastic bag
A) Place all fibers in a single envelope regardless of source B) Freeze the fibers to preserve color C) Collect fibers using sticky tape and store in paper packets D) Sweep the area with a vacuum cleaner and store the dust in plastic bags
A) Use bare hands to pick fragments and store in plastic containers B) Use gloves and tweezers to collect each fragment, wrapping them in paper C) Sweep all glass fragments together in a plastic bag D) Dissolve the glass in acid to simplify storage
A) Rub the tool mark with graphite to highlight it, then photograph B) Make a silicone cast of the tool mark and send to lab C) Measure the tool mark dimensions and discard the site evidence D) Apply tape to lift the mark and store in a plastic bag
A) Collect the largest item first, then smaller items B) Wash gloves between collections but reuse the same packaging C) Collect evidence from different locations using separate tools and packaging D) Combine evidence in one container to save time
A) Wash the blood to remove soil contaminants B) Collect wet blood with a sterile swab and air dry before packaging C) Immediately store blood in plastic and freeze D) Mix with ethanol and store in a sealed container
A) Drugs → Glass → Fibers → Blood B) Blood → Fibers → Glass → Drugs C) Glass → Blood → Drugs → Fibers D) Fibers → Glass → Blood → Drugs
A) Plastic bags for all evidence B) Wrap all items together in aluminum foil C) Paper envelopes for biological evidence, separate from trace evidence D) Store wet evidence together in a single container
A) Remove evidence without documenting to save time B) Only photograph the fiber sample C) Sketch the scene and label exact locations of all evidence collected D) Rely on memory for labeling evidence
A) Record the date, time, and collector’s initials on the evidence label B) Combine it with other glass fragments from unrelated cases C) Hand it directly to a lab staff without documentation D) Store in an unmarked envelope to prevent tampering
A) Analyze only one type of evidence to save resources B) Perform drug testing first since it is faster C) Split the sample: prioritize blood DNA extraction first, then drug analysis D) Mix the sample with preservatives and store for future analysis
A) C.Wash gloves to extract evidence, then store B) Remove fibers only and discard the gloves C) B.Cut gloves into pieces and place in separate plastic bags D) Collect gloves as a whole, air dry, and store in paper bags
A) Allowing the sample to air-dry before packaging B) Scraping it into a paper envelope while wet C) Sealing in an airtight plastic bag immediately D) Using a wet swab directly on the stain
A) In a wet swab container B) In cotton padding inside a sealed glass tube C) In a plastic bag with silica gel D) On adhesive tape sealed in a paper bindle
A) It fulfills chain of custody requirements B) It ensures sample representativeness C) It confirms the evidence’s scientific validity D) It prevents chemical degradation
A) Place in plastic ziplock B) Freeze immediately after collection C) Immerse in ethanol solution D) Air-dry and package in paper bag
A) Static charge contamination B) Trace transfer or breakage C) Chemical reaction with glass D) DNA degradation
A) Seal the sample in an airtight plastic bag immediately B) Scrape the sample into a paper envelope while still wet C) Allow the sample to air-dry completely before packaging D) Collect the sample with a wet swab
A) Place the hair in a wet swab container B) Affix the hair to adhesive tape, then seal the tape in a paper bindle C) Store the hair in a plastic bag with silica gel D) Enclose the hair in cotton padding inside a sealed glass tube
A) To fulfil chain of custody requirements B) To ensure the sample is representative of the whole C) To confirm the evidence's scientific validity D) To prevent chemical degradation of the sample
A) Leave it at the scene to avoid contamination B) Pour the liquid directly into a plastic container C) Using a sterile cotton swab, air dry, and package in a paper envelope D) Using a sterile cotton swab, air dry, and package in a paper envelope. B. Collect with a wet swab and seal in a plastic bag
A) Secure it in a cardboard box, noting the position of the safety and any cartridges remaining in the chamber B) Disassemble it to prevent accidental discharge C) Place it in a plastic bag to protect it from scratches D) Clean it thoroughly to remove fingerprints
A) Chemical; organophosphate B) Biological; bacterial toxin C) Chemical; heavy meta D) Biological; viral toxin
A) Naloxone B) Vitamin K C) Atropine, Hydroxocobalamin
A) Chemical poisons like arsenic affect metabolic enzymes directly B) Biological poisons require ingestion to be effective C) Biological poisons generally act faster than chemical D) Both act by enzymatic inhibition
A) Biological; supportive care B) Chemical; antidote administration C) Chemical; chelation D) Biological; induced vomiting
A) Both require enzymatic activation to exert effects B) Both are neutralized by the same antidote C) Both produce immediate CNS depression D) Methanol causes metabolic derangements; tetanus toxin disrupts neurotransmission
A) Cyanide requires enzymatic activation B) Cyanide is more potent than botulinum toxin C) Both act by the same mechanism D) Botulinum toxin has a lower lethal dose and acts via neuroinhibition
A) Administer atropine B) Only provide intravenous fluids C) Administer fomepizole to inhibit metabolism D) Use hydroxocobalamin as first-line
A) Biological poisons cannot be fatal B) Biological poisons can originate from bacteria like Clostridium C) Chemical poisons are only synthetic D) Both arise exclusively from natural sources
A) Mercury is neutralized by antibiotics B) Mercury is a biological poison that inhibits acetylcholinesterase C) Mercury acts by producing neurotoxins like botulinum D) Mercury is a chemical poison causing enzyme inactivation and renal damage
A) Both are treated with the same antidotes B) Both inhibit cellular respiration directly C) Ricin disrupts protein synthesis; CO binds hemoglobin to prevent oxygen delivery D) CO is less toxic than ricin in all doses
A) Measure serum cholinesterase levels B) Culture for Clostridium botulinum C) Only rely on clinical symptoms D) Administer empiric antibiotics
A) Atropine B) Hydroxocobalamin C) Fomepizole D) Vitamin K
A) Protein toxins diffuse faster than lipid-soluble chemicals B) Lipid-soluble chemicals diffuse rapidly; protein toxins may require receptor-mediated uptake C) Both cross cell membranes equally D) Both are eliminated through renal excretion only
A) Assume similar onset due to rapid toxicity B) Use a single antidote for both cases C) Only focus on symptoms for legal evidence D) Determine method of administration and onset of action
A) Early antidote administration in chemical poisoning significantly improves prognosis B) Delayed treatment always has no effect C) Both outcomes are identical regardless of treatment D) Biological poisons are unaffected by treatment timing
A) Synaptic acetylcholine degradation B) Enzymatic oxidation in mitochondria C) Red blood cell oxygen transport D) Neuromuscular transmission
A) Dimercaprol B) Naloxone C) Atropine D) Pralidoxime
A) Target organ specificity B) Source of origin C) Detectability through spectroscopy D) Mode of administration
A) Reinsch test B) Marsh test C) Duquenois-Levine test D) Lassaigne’s test
A) Cause immunological reactions B) May act rapidly with quantifiable doses C) Exhibit cumulative effects through metabolism D) Have no specific antidotes
A) Treat both cases identically because both are toxic B) Legal relevance is restricted to chemical poisons; biological toxins are not admissible C) Only chemical poisons require laboratory confirmation; biological poisons are assumed from symptoms D) Analyze the mechanism of action, onset, and specific antidotes for each poison to guide both treatment and legal interpretation
A) Only chemical poisons are relevant in legal proceedings B) All poisons are treated with the same antidotes regardless of type C) Biological poisons never require antidotes D) Antidote selection depends on the poison’s nature, mechanism, and biological target
A) Only chemical poisons can be used as evidence in court B) Court testimony does not require distinction between toxin types C) All toxins are equivalent for forensic reporting D) Biological and chemical poisons differ in structure, action, and detection, so each must be assessed independently
A) Apply analytical chemistry techniques for arsenic and protein-based detection methods for ricin to ensure accurate identification B) Use identical chemical assays for both poisons C) Only qualitative observations are required for biological poisons D) Laboratory confirmation is optional for chemical poisons
A) Symptom similarity is sufficient for both types; mechanism is irrelevant B) Consider the distinct pharmacokinetics, mechanisms, and available antidotes for each type to support both courtroom and clinical conclusions C) Biological poisons are inherently less relevant to forensic investigation D) Only chemical poisoning requires symptom analysis for evidence purposes |