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WorksheetsFINAL EXAMS- FORENSIC CHEMISTRY AND TOXICOLOGY
Total questions: 80
Worksheet time: 42mins
It is a scientific study that treats of nature, properties, effects and detection and the treatment in case of poisoning.
(a)
Poison is a substance capable of producing _________ effects on an individual under _________conditions.
(a)
A poison that is still poisonous no matter how diluted it is.
(a)
Volatile poisons are isolated by extraction with ___________ and _____________.
(a)
Powdered glass, diamond rust, hairpin, needles are examples for (a) irritants.
Examples of (a) neurotics are opium, alcohol and tobacco.
(a) are poisons that act on the brain causing disorder of mental functions resulting to confusion of free will.
Carbon Monoxide (CO), Hydrogen Cyanide (HCN) are examples of (a) poisons.
It is commonly used as rat poison and it causes so much pain.
(a)
Duquenois-_________ test is a widely used presumptive test for _______________ and other cannabinoids.
(a)
LSD stands for ________acid __________.
(a)
A presumptive test for cocaine.
(a)
It is by far the most widely used confirmatory test for toxins and poisons.
(a)
Generally, when a poison is (a) , the absorption is rapid, thus, resulting in intense toxic effects.
(a) is the smallest amount of medicine that can produce the desired therapeutic effect without causing harm.
Any agent that neutralizes a poison or otherwise counteracts or opposes its effects.
(a)
It is eyeball fluid. It very slow to decay so will retain toxins even longer than most other organs.
(a)
It is the malicious destruction of one’s property by means of fire.
(a)
For combustion to occur, 3 things must be present: a fuel to be burned, a source of (a) and a source of heat.
Used to cast the human body.
(a)
(a) is any material that contains marks, symbols, or signs—visible, partially visible, or invisible—that may convey a meaning or message.
Inorganic product of fusion which has cooled to a rigid condition without crystalizing.
(a)
3R Rule- __________ crack form a _________ angle on the ________ side of the force.
(a)
Is a unique number or marking stamped on the metal surface which are assigned for identification of many consumer products and commercial items.
(a)
It is a fluid used to restore tampered serial numbers.
(a)
It is the process by which the casing of a projectile from a bomb, artillery, Mortar, tank gun, shell, rocket, grenade, etc. is shattered by the detonation of the explosive filler.
(a)
Frequently, gun powder examinations are requested in cases of sudden and unexplained deaths.
TRUE
FALSE
Chronic poisoning is one in which there is gradual deterioration of functions tissues and may not result in death.
TRUE
FALSE
In poisoning, chemical evidence is not conclusive because some disease may show similar symptoms as those of poisoning.
TRUE
FALSE
Volatile poisons are isolated by extraction with organic solvents such as strychnine and other alkaloids.
TRUE
FALSE
Solid poisons not well absorbed into the blood, they must be dissolved in aqueous liquid lining the intestinal tract if inhaled or respiratory tract if ingested.
TRUE
FALSE
Castor oil, Croton oil and seed, capsicum as well as Snakes, Scorpion, Spider and Poisonous Insects are examples of inorganic irritants.
TRUE
FALSE
Van-Urk Test is a presumptive test used in drug analysis, specifically to identify barbiturates.
TRUE
FALSE
Mass spectrometry (MS) is the most discriminatory of the drug testing techniques.
TRUE
FALSE
Barium Chloride, which is readily soluble is extremely soluble, and is extremely toxic while Barium Sulfate is not because it is extremely soluble.
TRUE
FALSE
A poison is more rapidly absorbed when it is in gaseous state than in solid or liquid form.
TRUE
FALSE
Basically, poison is more rapidly absorbed when taken orally than when injected in the veins.
TRUE
FALSE
Toxic or Lethal Dose is harmful both to the healthy and the sick. While Poisonous or Fatal Dose is the dose that kills.
TRUE
FALSE
Demulcents include fatty products like egg, milk,albumin,oil etc.
TRUE
FALSE
Fire moves faster downhill.
TRUE
FALSE
Neil Armstrong’s famous footwear impression on the moon on the moon is an example of a 2D impression.
TRUE
FALSE
Indentation marks are made when surfaces slide across one another; the harder surface leaves scratch or striations on the softer area.
TRUE
FALSE
Molded tool marks are marks when the object is inserted into the surface.
TRUE
FALSE
A disputed document is always a questioned document, while a questioned document is not always a disputed document.
TRUE
FALSE
A paper cannot be older than the age of the document.
TRUE
FALSE
DNA is present in white blood cells of humans, but not red blood cells which lack nuclei.
TRUE
FALSE
In order to be used for DNA analysis, the hair must have been pulled from the body -- hairs that have been broken off do not contain DNA.
TRUE
FALSE
The Entrance hole of the projectile going through a glass is always larger than the exit hole.
TRUE
FALSE
Soil pH is commonly determined by adding saline solution to a soil sample and gently mixing the two.
TRUE
FALSE
Forensic soil analysis and evidence can help find bodies, disprove alibis, and help figure out where an important piece of evidence came from.
TRUE
FALSE
DUST is fine, dry powder consisting of tiny particles of earth or waste matter lying on the ground or on surfaces or carried in the air while DIRT is an unclean matter, especially when in contact with a person's clothes, skin or possessions.
TRUE
FALSE
Etching fluid are applied to the surface, the strained particles of the metal differ in the rate of solubility than those of the undisturbed particles and this difference in solubility makes it possible to remove the number, to restore the number that they can be read and photographed.
TRUE
FALSE
Struck coins made by striking or stamping method or these are coins made by means of dyes.
TRUE
FALSE
Example of cumulative poison.
HCN
HNO3
Arsenic
Mercuric chloride
Acute poisoning is due to the following except:
Taking a strong poison
Excessive single dose
Taking several small doses at long intervals
Several doses, small but frequent
This evidence is obtained by administering the suspected substance to some living animal and noting the effects or symptoms.
Circumstantial Evidence
Symptomatic Evidence
Experimental Evidence
Postmortem Evidence
These are solid or liquid particles small enough to remain suspended in air for a few minutes.
Gas
Vapor
Aerosol
Water Vapor
Examples of Corrosive Inorganic acids are the following except:
Nitric Acid
Sulfuric Acid
Acetic Acid
Hydrochloric Acid
These are substances that depresses or retards the physiological action of an organ.
Deliriants
Depressants
Exhaustive
Aesthetics
It is particularly useful for detecting opiate alkaloids and for amphetamines and methamphetamine.
Scott Test
Dillie-Koppanyi Test
Van-Urk Test
Marquis Test
A positive test result in Scott test is indicated by a:
Red color in the chloroform layer
Blue color in the chloroform layer
Colorless in the chloroform layer
Pink color in the chloroform layer
The largest amount that will cause no injury but at the same time produce the desired therapeutic effects.
Safe Dose
Poisonous Dose
Maximum Dose
Toxic Dose
Common Salt is an example of what antidote?
Chemical
Specific
Physical
True
A mechanical antidote that allow imprisoning of the particles on its surface.
Activated charcoal
Precipitants
Bulky foods
Emetics
This is administered if the nature of administered poison is not known and it is suspected that two or more poisons have been taken.
Physical antidote
Universal antidote
Physiological Antidote
Chemical Antidote
Causes of death in poisoning:
Cardiac Failure
Respiratory failure
General devitalizing
Shock to the nervous system
Which of the following is true on effects of blood alcohol concentration?
Confusion - 0.05 to 0.20 % ethanol on the blood -Marked decrease to stimuli approaching paralysis
Coma or death - 0.25-0.40 % ethanol on the blood- Decreased inhibition, emotional instability, incoordination
Stupor - 0.25-0.40 % ethanol on the blood -Marked decrease to stimuli approaching paralysis
Stimulation - 0.01 – 0.10 % ethanol on the blood - Decreased inhibition, emotional instability, incoordination
Molecule to molecule transfer of heat through conducting solids such as metal beams or pipes.
Convection
Radiation
Conduction
Direct Burning
Multiple fires at the same time at the same location.
Spree Arson
Mass Arson
Serial Arson
Trip Arson
It is a test in which debris is extracted and washed with a small amount of n-pentane, n-hexane or carbon disulfide.
Vacuum distillation
Solvent Extraction
Steam distillation
Charcoal sampling
Visible 2-dimensional impressions produced as an object moves through soil, dust, or other fine particles.
Latent
Patent
Plastic
Rubber
A substance added to ink to prevent it from drying out or separating over time.
Additive
Colorant
Drying Agent
Dye
An oil-based type of pen ink.
Dip Pen Ink
Fountain Pen Ink
Ballpoint Pen Ink
Rollerball
DNA is
Deoxyribonucleous Acid
Deoxyribosenucleic Acid
Deoxyribonucleic Acid
Deoxyribolenucleic Acid
How do you collect a specimen if it is a bloodstain found at the weapon of offense?
Air dry in room temperature and transfer the stain on a gauze, air dry and pack in cotton cloth or envelope paper.
Collect clot in test tube and add equal volume of saline solution
Collect item directly. It should be packed separately in boxes with the stained area covered by paper.
Scratch crush into paper packet.
It's a test to detect genetic material from a specific organism, such as a virus.
Short Tandem Repeats
Polymerase Chain Reaction
Flocculation Test
Neutralization Test
What source of DNA is commonly found in evidences such as toothpick, used cigarette, bottle and bite marks?
Blood
Semen
Saliva
Hair
These are fractures extending outward from the point of impact and is always the first to appear on glass.
Concentric
Radial
Fracture by heat
This type of soil originated by mechanical disintegration and wind deposit.
Red Soil
Desert Soil
Mountain Soil
Residual Soil
Soil is analyzed by comparing these 5 elements:
Particle Size, Solubility, pH, Magnetism, Color
Color, Particle Size, Density, Magnetism, pH
Weight, Density ,Color, Water Content, Magnetism
Density, Color, pH, Toxicity, Particle Size
