Forensic Chemistry & Toxicology
a. Codeine
b. Narcotine
c. Morphine
d. Ecgonine
ANSWER:
d. Ecgonine
Q2. Which of the following is known as date rape drug ?
a. Heroin
b. Cocaine
c. Charas
d. Flunitrazepam
ANSWER:
d. Flunitrazepam
Q3. What is the color of the flame when alcohol is burned?
a. Red color
b. Yellow-orange color
c. Blue color
d. Pale yellow color
ANSWER:
c. blue color
EXPLANATION:
When alcohol burns, it produces a mostly blue flame due to complete combustion. This complete combustion means that the alcohol is burning efficiently with sufficient oxygen, resulting in the blue flame. The blue color is associated with the high temperature of the flame.
Q4. Which of the following is a liquid explosive?
a. PETN
b. RDX
c. TATP
d. HMX
ANSWER:
c. TATP
EXPLANATION:
A liquid explosive is a substance in its liquid state that can rapidly expand into a gas and release a large amount of energy upon detonation. Examples include triacetone triperoxide (TATP), nitromethane, and nitroglycerin. These substances are often of concern for security reasons due to their potential use in improvised explosive devices (IEDs).
Q5. Heat of conversion of explosive into gases is of order of?
a. Milli-sec
b. Micro-sec
c. Nano-sec
d. Pico-sec
ANSWER:
b. Micro-sec
EXPLANATION:
Explosions happen very quickly, with the chemical reactions involved occurring on the order of microseconds. This rapid release of energy generates high pressure and temperature.
Q6. Which of the following is NOT classified as hallucinogen?
a. Marijuana
b. Methadone
c. Psilocybin
d. LSD
ANSWER:
b. Methadone
EXPLANATION:
Methadone is in a class of medications called opiate (narcotic) analgesics. Methadone works to treat pain by changing the way the brain and nervous system respond to pain.
Q7. Which of the following method can be used to analyze metallic poisons after dry-ashing?
a. Gel chromatography
b. Ion chromatography
c. Gas chromatography
d. Micellar electrokinetic capillary chromatography
ANSWER:
b. Ion chromatography
EXPLANATION:
Ion chromatography is a type of chromatography specifically designed to separate and analyze ions. It's ideal for metallic poisons after dry-ashing because it can effectively handle charged species, which are often formed when metals are ashing.
Q8. Assertion (A) – Derivatives of phosphoric acid having insecticidal activity are safe for mammals.
Reason (R) – The replacement of one of the oxygen atoms by sulphur in the derivatives of phosphoric acid decreases the toxicity of compound related to mammals.
a. (A) is true but (R) is false
b. (A) is false but (R) is true
c. Both (A) and (R) are true
d. Both (A) and (R) are false
ANSWER:
b. (A) is false but (R) is true
EXPLANATION:
Derivatives of phosphoric acid with insecticidal activity, particularly organophosphates, are generally not safe for mammals. They can be highly toxic to mammals, including humans, due to their mechanism of action, which involves inhibiting an enzyme essential for nerve function, which is also present in insects.
The replacement of oxygen atoms with sulfur in phosphoric acid derivatives, creating phosphorothioates, can indeed decrease the toxicity of the compound for mammals. This is because the sulfur-containing derivatives tend to be less reactive with the same enzyme that organophosphates inhibit, leading to reduced toxicity.
Q9. Which of the following can be analysed using Head space GC?
a. Paint
b. Blood alcohol
c. Benzodiazepine
d. Morphine
ANSWER:
b. Blood alcohol
EXPLANATION:
Headspace Gas Chromatography (HS-GC) is specifically designed to analyze volatile compounds, and blood alcohol content (BAC) falls under this category, making it a suitable application for this technique.
Q10. The blue color of PDS kerosene is due to the presence of?
a. Rhodamine B
b. Fast blue B
c. Di-alkyl amino anthraquinone
d. Phenyl azo-2-naphthol
ANSWER:
c. Di-alkyl amino anthraquinone
EXPLANATION:
PDS kerosene stands for Public Distribution System kerosene, and the blue dye added to it is typically di-alkyl amino anthraquinone.
Phenyl azo-2-naphthol: This dye is typically used to color orange petrol.
Content Writer:- Bhawana Sharma
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