Forensic Chemistry: Indian IED Casework (Mumbai 1993, 26/11, Signature Analysis)
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
24 May 2026
About this mock
UGC-NET Forensic Science Unit VI advanced drill on improvised explosive device casework drawn from major Indian incidents and the forensic-investigative framework built around them. Hard-band coverage on the 12 March 1993 Mumbai serial blasts (RDX-gelatin charges concealed in vehicles and tiffin boxes across twelve sites, TADA prosecution, Yakub Memon conviction), the 26 November 2008 Mumbai attacks (Lashkar-e-Taiba's gun-and-IED hybrid operation, RDX recovered from Taj and Oberoi hotels, Pakistan-origin trace evidence), and the 14 February 1998 Coimbatore serial blasts (Al Ummah, gelatin-timer chains, thirteen detonations, TADA charges). Mecca Masjid Hyderabad 2007 and Malegaon 2008 are drilled on NIA investigative workflow, scheduled offences under the NIA Act 2008, and the forensic-chemistry challenges of secondary blast-site sampling.
Signature-analysis coverage spans Maoist/Naxal IED construction (pressure-plate victim-initiated devices, command-wire systems, ammonium-nitrate-based fill), LeT versus Indian Mujahideen versus SIMI construction differences (military-grade RDX and PETN versus locally synthesised ammonium nitrate mixtures, detonator sourcing, timer circuit type), and how examiners trace group affiliation from component, initiator and packing patterns. Institutional coverage includes the National Investigation Agency constituted under the NIA Act 2008, the NSG 51 Special Action Group for bomb disposal, and the CFSL Hyderabad explosives analysis unit.
The legal framework sub-topic covers Explosive Substances Act 1908 (Sections 3, 4 and 5), the Unlawful Activities (Prevention) Act 1967 as amended through 2019, the NIA Act 2008 scheduled-offence list, and the BNS 2023 provisions that replaced IPC terror-related clauses from 1 July 2024. Calibrated for Paper II top-decile candidates.
Topics covered:
- Mumbai 1993 serial blasts: RDX-gelatin composition, twelve sites, TADA chargesheet
- Mumbai 26/11 2008: LeT sea route, RDX hotel charges, Pakistan-origin trace, NIA Act genesis
- Coimbatore 1998: Al Ummah, gelatin-timer chains, TADA prosecution
- Mecca Masjid 2007 and Malegaon 2008: NIA workflow, scheduled offences, blast-site sampling
- Maoist/Naxal IED construction: pressure plate, command wire, AN-based fill
- LeT / IM / SIMI signature differences: composition, initiator, timer, packing traces
- Investigative bodies: NIA Act 2008, NSG 51 SAG, CFSL Hyderabad explosives unit
- Legal framework: ESA 1908, UAPA 1967, NIA Act 2008, BNS 2023
Allow 30 minutes.
Sources & references
Questions in this mock are written and verified against the following sources. Citations are recorded per question and shown in the explanation after submission.
- cited in 2 questions
State of Maharashtra v. Mohammad Ajmal Mohammad Amir Kasab, Sessions Court Mumbai (2010); NIA chargesheet on 26/11 attacks
Trial court judgment on MV Kuber hijacking, sea route from Karachi, GPS and navigation records as forensic evidence
- cited in 2 questions
State of Maharashtra v. Yakub Abdul Razak Memon, (2013) 13 SCC 1
Supreme Court of India, TADA appeal judgment, site count from TADA chargesheet forensic annexure; twelve detonation sites on 12 March 1993
- cited in 2 questions
Sharma, B.R. -- Forensic Science in Criminal Investigation and Trials, 5th Edition
Chapter on Explosives and Explosive Residues: TLC-Griess and HPLC confirmatory pair for RDX identification in post-blast samples
- cited in 1 question
Sharma, B.R. -- Forensic Science in Criminal Investigation and Trials, 5th Edition; CFSL Hyderabad post-blast examination procedures
Chapter on Explosive Devices: command-wire IED construction and post-blast forensic signatures; copper wire remnants as key exhibits
- cited in 1 question
Explosive Substances Act 1908, Sections 3, 4 and 5
ESA 1908 Section 3: explosion likely to endanger life or cause serious injury to property; indiacode.nic.in
Open source - cited in 1 question
National Investigation Agency Act 2008; Statement of Objects and Reasons, NIA Act 2008
Legislative history of NIA Act 2008: enacted 31 December 2008 in direct response to 26/11 Mumbai attacks; indiacode.nic.in
Open source - cited in 1 question
Sharma, B.R. -- Forensic Science in Criminal Investigation and Trials, 5th Edition; MHA counter-IED advisories on Naxal devices
Chapter on Explosive Devices: pressure-plate switch construction, victim-initiated initiation, Naxal IED patterns documented in CFSL post-blast reports
- cited in 1 question
State of Maharashtra v. Mohammad Ajmal Mohammad Amir Kasab, (2012) 9 SCC 1
Supreme Court of India, criminal appeal judgment, August 2012, confirming conviction and death sentence under IPC 1860 and UAPA 1967
- cited in 1 question
Sharma, B.R. -- Forensic Science in Criminal Investigation and Trials, 5th Edition; TADA chargesheet in Coimbatore 1998 blasts
Chapter on Explosives: gelatin explosive composition and timer-circuit initiation in Indian IED casework; Coimbatore 1998 forensic record
- cited in 1 question
Unlawful Activities (Prevention) Act 1967, Section 15(1) as amended by UAPA Amendment Acts 2004 and 2008
UAPA Section 15: terrorist act definition, intent requirement, indiacode.nic.in
Open source - cited in 1 question
Bharatiya Nyaya Sanhita 2023, Sections 113, 147 and 150; Indian Penal Code 1860, Section 121
BNS 2023 Section 147: correspondence to IPC Section 121 (waging war); effective from 1 July 2024; indiacode.nic.in
Open source - cited in 1 question
State of Maharashtra v. Yakub Abdul Razak Memon, (2013) 13 SCC 1; Explosive Substances Act 1908
Supreme Court of India, TADA appeal; TADA chargesheet forensic findings on RDX-gelatin composition at twelve blast sites, 12 March 1993
- cited in 1 question
NIA Act 2008, Sections 6 and 8; NIA investigation of Mecca Masjid blast; Explosive Substances Act 1908
NIA re-investigation of Mecca Masjid Hyderabad blast (18 May 2007); post-blast forensic reports from CFSL and state FSL
- cited in 1 question
TADA chargesheet and trial judgment in the Coimbatore 1998 serial blasts case; reported in Law Commission of India reports on TADA
Prosecution record establishing L.K. Advani BJP rally as the intended target; Al Ummah conspiracy chronology
- cited in 1 question
Sharma, B.R. -- Forensic Science in Criminal Investigation and Trials, 5th Edition; CFSL Hyderabad post-blast scene examination procedures
Chapter on Explosive Devices: culvert bomb construction and post-blast scene features; distinguishing sub-surface from surface IEDs
- cited in 1 question
National Investigation Agency Act 2008, Sections 3, 6, 9 and 14; Schedule of Offences
NIA Act 2008, Section 6(1) and 6(4): Central Government direction for NIA investigation of Scheduled Offences; indiacode.nic.in
Open source - cited in 1 question
CrPC 1973, Section 293 (now BNSS 2023, Section 336); MHA Directorate of Forensic Science Services operational guidelines
Chain-of-custody and forensic referral framework: NIA scene management, CFSL laboratory analysis, Chemical Examiner report as evidence
- cited in 1 question
MHA Directorate of Forensic Science Services; CFSL Hyderabad mandate and divisional structure
CFSL Hyderabad explosives division: primary national referral for IED chemistry, post-blast analysis and explosive residue identification
- cited in 1 question
Terrorist and Disruptive Activities (Prevention) Act 1987, Sections 3(1), 3(3) and 5; Explosive Substances Act 1908, Section 3
State of Maharashtra v. Yakub Abdul Razak Memon, (2013) 13 SCC 1, TADA Designated Court chargesheet and Supreme Court appeal judgment
- cited in 1 question
NIA chargesheet in the 26/11 Mumbai attacks case; State of Maharashtra v. Mohammad Ajmal Mohammad Amir Kasab, Sessions Court Mumbai (2010)
NIA technical annexure on VoIP communication tracing, server logs and call detail records establishing Pakistan-based operational control
- cited in 1 question
Sharma, B.R. -- Forensic Science in Criminal Investigation and Trials, 5th Edition; Explosives Act 1884; Explosive Substances Act 1908
Chapter on Explosives: ammonium nitrate availability and use in Naxal IEDs; CFSL post-blast composition analysis of AN-based devices in central India
- cited in 1 question
NIA chargesheet in 26/11 Mumbai attacks; NIA Act 2008; published court judgments on LeT device forensic analysis
Forensic attribution of LeT devices to military-grade RDX: NIA chargesheet forensic annexure, Kasab trial judgment
- cited in 1 question
NIA chargesheet in the Malegaon 29 September 2008 blast case; NIA Act 2008
NIA investigation findings: Hero Honda motorcycle as delivery platform, RDX-based charge, vehicle registration as forensic link in evidence chain
- cited in 1 question
Terrorist and Disruptive Activities (Prevention) Act 1987; TADA lapsing ordinance savings clause (1995)
Legal framework on TADA savings clause: continuity of prosecutions for pre-lapse conspiracies; applicable to Coimbatore 1998 TADA chargesheet
Open source - cited in 1 question
NIA chargesheets in Indian Mujahideen cases; CFSL Hyderabad forensic reports on timer circuit examination
CFSL forensic analysis of 555-timer IC circuits in IM device exhibits; component sourcing and assembly trace methodology
- cited in 1 question
National Security Guard organisational structure; MHA publications on NSG mandate and force composition
NSG force structure: 51 SAG (assault), 51/52 SRG (protection and EOD); MHA annual reports on NSG operations
- cited in 1 question
NIA chargesheets in Indian Mujahideen cases (Ahmedabad 2008, Delhi 2008); NIA Act 2008
NIA forensic annexures on mobile-phone trigger circuits as IM construction signature in 2006 to 2013 cases
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Questions are written and edited by the ForensicSpot team and cited from peer-reviewed forensic textbooks, official syllabi and primary case law. Each one is verified before publishing. Detailed explanations show after you submit, so the test stays a real test. See a mistake? Tell us.
Common questions
What does the Forensic Chemistry: Indian IED Casework (Mumbai 1993, 26/11, Signature Analysis) mock cover?+
UGC-NET Forensic Science Unit VI advanced drill on improvised explosive device casework drawn from major Indian incidents and the forensic-investigative framework built around them. Hard-band coverage on the 12 March 1993 Mumbai serial blasts (RDX-gelatin charges concealed in vehicles and tiffin boxes across twelve sites, TADA prosecution, Yakub Memon conviction), the 26 November 2008 Mumbai attacks (Lashkar-e-Taiba's gun-and-IED hybrid operation, RDX recovered from Taj and Oberoi hotels, Pakist
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: hard. Tier: Premium.
Who is this mock for?+
Forensic science students and aspirants who want timed, exam-style practice with explanations and verified source citations on Forensic Chemistry, NET. Useful for postgraduate entrance preparation and for BSc / MSc forensic students testing their recall under time.
Are the questions reviewed?+
Each question carries a verified source citation. Faculty review for individual questions is in progress.
Do I need an account to take this mock?+
Yes, a free ForensicSpot account is required to start a timed attempt — this lets you save progress, see per-question explanations after submission, and track your topic-level performance over time.