Chemistry and Toxicology

Chemistry and Toxicology

Chemistry and Toxicology Quiz Crafted by - 

Dr. Shaloo Malik

Assistant Director (Toxicology),

Regional Forensic Science Laboratory, Jodhpur


Introduction to Chemistry and Toxicology 

Toxicology is a scientific discipline, overlapping with biology, chemistry, pharmacology, and medicine, that involves the study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants. The relationship between dose and its effects on the exposed organism is of high significance in toxicology. Factors that influence chemical toxicity include the dosage, duration of exposure (whether it is acute or chronic), route of exposure, species, age, sex, and environment. Toxicologists are experts on poisons and poisoning. There is a movement for evidence-based toxicology as part of the larger movement towards evidence-based practices. Toxicology is currently contributing to the field of Cancer research, since some toxins can be used as drugs for killing tumor cells. One prime example of this is Ribosome Inactivating Proteins, tested in the treatment of Leukemia.


Let's look at the questions and their answers.

Que 1. The percentage of ethyl alcohol (v/v) in proof spirit is

a) 0.571%

b) 57.1%

c) 0.49%

d) 49.28%

Answer - b) 57.1%


Que 2. The range of UV-Visible spectrum is 

a) 100 nm- 200 nm

b) 200 nm-800 nm

c) 200 nm-400 nm

d) 400 nm-800 nm

Answer - b) 200 nm-800 nm


Que 3. Indicator Phenolphthalein  shows following reaction

a) Colourless in acidic solution and pink in basic solution

b) Pink in acidic solution and colourless in basic solution.

c) Colourless in acidic solution and blue in basic solution

d) Blue in acidic solution and colourless in basic solution

Answer - a) Colourless in acidic solution and pink in basic solution


Que 4. The colour of the precipitate obtained by reaction of Ammonium ion with Nessler’s reagent in presence of NaOH is

a) Blue

b) Black

c) Brown

d) Yellow

Answer - c) Brown


Que 5. In mass spectrometry, the peak with 100 intensity is known as

a) Molecular Ion peak

b) Base peak

c) Metastable Ion peak

d) Mc Lafferty Rearrangement Ion peak

Answer - b) Base peak


Que 6. Amanita muscaria and Amanita phalloides are the common varieties of

a) Protozoa

b) Poisonous Algae

c) Poisonous Mushroom

d) Pathogenic Bacteria

Answer - c) Poisonous Mushroom


Que 7. Reinsch’s Test is an analytical method to test the presence of

a) Metallic poisons

b) Pesticides

c) Anions

d) Corrosive acids

Answer - a) Metallic poisons


Que 8. The explosive material  discovered by Alfred Nobel in 1867 was

a) PETN

b) Ammonium nitrate

c) Dynamite

d) TNT

Answer - c) Dynamite


Que 9. The scientific  name of Jamal Gota is 

a) Ergot

b) Capsicum annum

c) Croton tiglium

d) Semicarpus anacardium

Answer - c) Croton tiglium


Que 10. The universal detector for High Performance Liquid  Chromatography  (HPLC) is 

a) Ultraviolet-Visible Detector

b) Refractive Index Detector

c) Electrochemical Detector

d) Fluorescence Detector

Answer - a) Ultraviolet-Visible Detector


Que 11.  Strychnine and Brucine are the main alkaloids of the plant 

a) Aconite

b) Erythroxyllum coca

c) Nux vomica

d) Papaver sominiferum

Answer - c) Nux vomica


Que 12. The principle alkaloid in terms of highest percentage  in Papaver sominiferum  (Opium) is

a) Narcotine

b) Morphine

c) Codeine

d) Papaverine

Answer - b) Morphine


Que 13. Wood spirit or Wood naphtha is common name for

a) Methanol

b) Ethanol

c) Isopropyl  Alcohol

d) Butyl  Alcohol

Answer - a) Methanol


Que 14. The principle alkaloid in terms of highest percentage in Papaver sominiferum (Opium) is

a) Narcotine

b) Morphine

c) Codeine

d) Papaverine

Answer - b) Morphine


Que 15. The blend of cement and sand in various proportions is known as

a) Concrete

b) Mortar

c) Silica

d) Lime sand

Answer - b) Mortar


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