Note: This whole section is a part of Forensic Chemistry MCQs that includes topics such are arson, petroleum, and explosive products. These are made specifically for the preparation of NTA UGC NET and University entrance tests.
1. Explosives are described in
- Explosive Substance Act, 1908
- Explosive Substance Act, 1928
- Explosive Substance Act, 1980
- Explosive Substance Act, 1918
Answer
Answer: (1) Explosive Substance Act, 1908
2. The process of breaking the molecules of a chemical into atoms under pressure, the atoms recombining to form gases the whole phenomena taking place with extreme rapidity is called
- Brisance
- Burning
- Deflagration
- Detonation
Answer and Explanation
Answer: (4) Detonation
Explanation: Detonation: Combustion process that produces waves higher than the supersonic speed.
-> Deflagration: Combustion that produces the subsonic speed waves.
-> Brisance: Shattering capability of a high explosive.
3. All are detonators except
- RDX
- Mercury fulminate
- Lead aside
- Lead styphnate
Answer and Explanation
Answer: (1) RDX
Explanation: RDX is not a detonator but an explosive with the chemical formula C3H6N6O6 and IUPAC name: 1,3,5-Trinitro Perhydro-1,3,5-triazine. In general, RDX is more explosive than TNT.
4. Assertion(A): Low explosives cause less devastation to life and property.
Reason(R): They produce less gas and energy.
- Both (A) and (R) are true
- Both (A) and (R) are false
- (A) is true But (R) is False
- (A) is false but (R) is true
Answer
Answer: (1) Both (A) and (R) are true
5. The percentage of cooking gas-forming explosive mixture with air is :
- 12 – 15%
- 9 – 12%
- 8 – 9%
- 2 – 7%
Answer and Explanation
Answer: (4) 2 – 7%
Explanation: In general talking, the cooking gas cylinder doesn’t explode till the gas level in-cylinder reaches 1.4% to 7.6% gas to air ratio.
6. An explosion during fire due to the mixing of fresh air in a compartment having inflammable, volatile pyrolysis products & low oxygen is known as:
- Flashback
- Flame over
- Rollover
- Dropdown
Answer
Answer: (1) Flashback
7. Which of the organs is commonly affected by shock waves?
- Heart
- Lungs
- Brain
- Liver
Answer and Explanation
Answer: (2) Lungs
Explanation: The shock waves from the blast are more extensive damage to the air-filled organs. This leads to the deformation of the thoracic wall and serves hemorrhages to the lungs. Other uncommon traumatic injuries are seen in auditory organs, eyes, brain, and gastrointestinal tract.
8. The flash burns in case of explosion injury is due to:
- Radiation
- Conduction
- Convection
- None of the above
Answer
Answer: (1) Radiation
9. Components of R-D-X is:
- 1- nitroguanidine
- Cyclotrimethylene Trinitramine
- Cyclotetramethylene tetranitramine
- Trinitrotoluene
Answer
Answer: (2) Cyclotrimethylene Trinitramine
10. l.E.D. means:
- Indian Explosive Devices
- Internal Explosive Devices
- Improvised Explosive Devices
- International Explosive Devices
Answer and Explanation
Answer: (3) Improvised Explosive Devices
Explanation: Improvised explosive devices (IEDs) are incendiary devices that are constructed without any standard way, but they have conventional power of destruction.
11. The following explosives are secondary explosives:
(i) Lead azide (ii) RDX (iii) Fulminate of Mercury (iv) T.N.T.
- (i) and (ii) are correct
- (ii) and (iii) are correct
- (ii) and (iv) are correct
- (i), (ii), (iii) and (iv) are correct
Answer and Explanation
Answer: (3) (ii) and (iv) are correct
Explanation: -> Primary explosives can explode from some sources such as flame, spark, impact, etc. such as nitroglycerin.
-> Secondary explosives require a detonator to get explodes such as TNT and RDX.
12. Which of the following explosives was first prepared for medicinal use in 1899?
- RDX
- PETN
- ANFO
- HMX
Answer and Explanation
Answer: (1) RDX
Explanation: It was first prepared by a German named Georg Friedrich Henning, for medicinal use. But later in 1920, Edmund von Herz patents it as explosives.
13. Match the following:
List-I | List-II |
(a) R.D.X. | (i) 2, 4, 6 Trinitrotoluene |
(b) T.N.T. | (ii) Cyclotetra methylene tetra Nitra amine |
(c) P.E.T.N. | (iii) Cyco tri-methlene trinitra amine |
(d) H.M.X. | (iv) Pentaerythritol tetranitrate |
(a) | (b) | (c) | (d) | |
1. | (i) | (ii) | (iii) | (iv) |
2. | (iv) | (i) | (ii) | (iii) |
3. | (iii) | (i) | (iv) | (ii) |
4. | (ii) | (iii) | (i) | (iv) |
Answer and Explanation
Answer: (3) (iii), (i), (iv), (ii)
Explanation: Read More: Composition of Explosives: Tabulated Forensic Ballistic List
14. P.E.T.N. is
- Penta Erythritol Trinitrate
- Penta Erythritol Dinitrate
- Penta Erythritol Tetranitrate
- 1-Nitroguaindine
Answer
Answer: (3) Penta Erythritol Tetranitrate
15. Main component of High explosive ‘Picratol’ is
- TNT and PETN
- TNT and Ammonium picrate
- RDX and Ammonium picrate
- Ammonium nitrate and Ammonium picrate
Answer and Explanation
Answer: (2) TNT and Ammonium picrate
Explanation: -> Picratol= TNT (2,4,6-trinitrotoluene) + Ammonium Picrate
-> Amatex= TNT + Ammonium nitrate + RDX
-> Ammonal= TNT + Ammonium nitrate + Aluminium
-> C-4= RDX. (91%) + plasticizer (9%)
16. This is used in Molotov cocktail:
- Arsenic
- Gasoline
- Phosphorous
- Magnesium
Answer and Explanation
Answer: (2) Gasoline
Explanation: It is an incendiary device typically consisting of a bottle filled with a flammable liquid and with a means of ignition flare.
16. Which of the following are examples of IED (Improvised Explosive Device)
- Acid bomb
- Letter bomb
- Molotov cocktail
- All of the above
Answer and Explanation
Answer: (4) All of the above
Explanation:
-> An improvised explosive device (IED) is a bomb constructed and deployed in ways other than in conventional military action.
-> An acid bomb is an IED that uses the reaction of an acid and a base to cause an explosion.
-> A letter bomb, also called a parcel bomb, is an explosive device sent via the postal service and designed to explode when opened.
-> Molotov Cocktail is an incendiary device typically consisting of a bottle filled with a flammable liquid and with a means of ignition.
-> Other names for Molotov Cocktail are petrol bomb, gasoline bomb, bottle bomb, poor man’s grenade, and fire bottle.
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Answer of 16th question would be all of the above?
Yes, you’re correct. Answer is updated. Thankyou pointing out it.