MCQs On Forensic Chemistry

Enhance your Knowledge of Forensic Chemistry by taking this test.

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#1. The basic chemical process in burning is:

Oxidation

Ignition

Hydroxylation

Combustion

#2. The important characteristic of petrol includes:

Density

All

Anti-knock index

Research octane number

#3. Organophorous compounds and carbamates are powerful inhibitors of:

Monoacetylcholin esterase

None

Acetylcholin esterase

Cholin esterase

#4. Varnish is traditionally a combination of drying oil, a resin and a____.

Enamel

Metal Ink

Lacquer

Thinner

#5. The major component of “Molotov Cocktail’ is:

Ethyl Alcohol

Gasoline

Lead azide

Valine

#6. Petroleum products include:

LPG and CNG

Aviation spirit

All

Kerosene

#7. Which of the following is the cause of ‘Hooch Tragedy’?

Acetaldehyde

Formalin

Acetic Acid

Methanol

#8. Blue colour of PDS kerosene is due to the presence of which dye?

Anthraquinone

Dialkyl amino anthraquinone

Anthracene

Phenyl azo-naphthol

#9. ‘Proof’ in alcoholic drinks is:

Twice the percentage of alcohol contents

8% of alcoholic percentage

12/13 parts of alcohol percentage

Equal to the percentage of alcohol contents

#10. Which of the following solvents has the highest boiling point?

Xylene

n-heptane

n-pentane

n-hexane

#11. The flash point of typical standard diesel is:

35°C-40°C

110°C-145°C

60°C-85°C

10°C-20°C

#12. Blood Alcohol Concentration (BAC) is measured in:

Volume/Volume percent

Weight/Volume percent

All

Weight/Weight percent

#13. The inert ingredient in aluminium phosphide tablet which prevents self-ignition of phosphide gas is:

Ammonium Carbamate

Sodium Chlorate

Potassium Chloride

Diphenyl Amine

#14. the modern breath alcohol instrument is based on technology of:

Fluorescence spectroscopy

Infrared spectroscopy

Emission spectroscopy

NMR spectroscopy

#15. Aluminum, calcium, magnesium and cobalt are components of:

Green colour safety glass

Red colour safety glass

Yellow colour safety glass

Blue colour safety glass

#16. When the temperature of a liquid is raised:

Its refractive index decreases

Its refractive index increases

Its refractive index disappears

Its refractive index doesn’t change

#17. Which of the following is used to colour motor gasoline?

Di-alkyl amino anthraquinone

Phenyl azo-2-napthol

Eosine

Erythrosine

#18. Kozelaka and Hine method is used for the quantitative estimation of

Cannabis

Opium

Cocaine

Ethyl Alcohol

#19. The following colour tests is applied for the detection of halogenated hydrocarbons?

Sodium nitroprusside

Fujiwara Test

Koppanyi-Zwikker Test

Cobalt thiocyanate

#20. Diphenyl Amine Reagent (DPA) used for identification of explosive is prepared for dissolving 1gm of diphenylamine in 100 ml of which of the following:

Concentrated Hydrochloric Acid

Concentrated Sulphuric Acid

Concentrated Nitric Acid

Concentrated Acetic Acid

#21. In trap cases, the pink colour of ‘Phenolphthalein’ fades due to:

Complex with Na2CO3

2 (4-hydroxybenzoyle) benzoic acid and phenol

Phenolic anhydride

Trichlorophenolphthalein

#22. O-tolidine is 3, 3’dimethyl derivative of:

Benzidine

Sodium acetate

Sodium chloride

Phenopthaline

#23. Assertion (A): As the rhodamine ‘B’ in ballpoint pen ink degrades, it losesthe ethyl groups. Reason (R): The ethyl groups are replaced by hydrogen atoms.

Both (A) and (R) are false.

(A) is true, but (R) is false.

Both (A) and (R) are true.

(A) is false, but (R) is true.

#24. The presence of two isotopes of Bromine i.e Br79 and Br81 can simply be detected in mass spectra when the peak intensities of their M and M+2 are in the ratio of:

3:1

1:1

1:3

1:2

#25. The average elimination or ‘burn-off’ rate of alcohol is approximately

0.015% w/v per hr.

0.05% w/v per hr.

0.15% w/v per hr.

0.5% w/v per hr.

#26. 90% of the total ethanol consumed in body is converted into acetaldehyde and acetic acid within the:

Stomach

Liver

Lung

Kidney

#27. The time take by an unretained species to pass through a chromatography column is known as:

Lag time

Void time

Flow time

Retention time

#28. Domestic kerosene is blue in colour due to:

Coomassie Blue

Anthracene

Eosine

Oil blue 35

#29. Radiations emitted by radioactive elements are:

Gamma rays

All

Alpha rays

Beta rays

#30. Kerosene is a blend of:

Naphthenes

Paraffins

Aromatics

All

finish

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MCQs On Forensic Chemistry

#1. The basic chemical process in burning is:

#2. The important characteristic of petrol includes:

#3. Organophorous compounds and carbamates are powerful inhibitors of:

#4. Varnish is traditionally a combination of drying oil, a resin and a____.