JKPSC Scientific, Research & Professional Posts Recruitment Examination
Post: Scientific Officer, Narcotics (Forensic Science Laboratory, J&K) Subject/Discipline: Forensic Science Maximum Marks: 100 Time Allowed: 3 Hours
General Instructions
- This paper is divided into four sections — A, B, C and D. All sections are compulsory unless otherwise stated.
- Section A contains Objective Questions (MCQ / Assertion–Reason / Match the Following) to be answered in the space/OMR sheet provided.
- Section B contains Short Answer Questions. Answers should not exceed 150 words each.
- Section C contains Analytical, Numerical and Technical Questions. Show all working for numerical questions.
- Section D contains Long Answer, Case-Study and Professional Application Questions. Answers should be well structured, with headings/sub-headings where appropriate.
- Marks for each question are indicated against it.
- Use of calculators is permitted only for Section C numerical questions unless stated otherwise.
- Write legibly and number your answers correctly.
SECTION A — Objective Questions (20 × 1 = 20 Marks)
A1. The term “Forensic” is derived from the Latin word forensis, which means: (a) Crime (b) Law (c) Forum/Public Debate (d) Evidence Marks: 1 | Syllabus Mapping: Unit 1 – Definition of Forensic Science | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the etymology and formal definition of forensic science.
A2. Which of the following is NOT generally recognized as a branch of Forensic Science under the syllabus scope? (a) Forensic Ballistics (b) Forensic Toxicology (c) Forensic Odontology (d) Forensic Astronomy Marks: 1 | Syllabus Mapping: Unit 1 – Branches of Forensic Science | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the standard list of forensic science branches and their scope.
A3. Assertion (A): Forensic Science in India developed significantly after the establishment of the first Forensic Science Laboratory. Reason (R): Forensic Science Laboratories provide scientific support to investigation agencies. (a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is NOT the correct explanation of A (c) A is true, R is false (d) A is false, R is true Marks: 1 | Syllabus Mapping: Unit 1 – Development of Forensic Science in India | Difficulty: Moderate | Cognitive Level: Understand | Competency: Conceptual Understanding Learning Hint: Revise the historical milestones in the development of forensic science infrastructure in India.
A4. Match the following branches of Forensic Science with their primary area of study: Column I: (i) Forensic Toxicology (ii) Forensic Ballistics (iii) Forensic Odontology (iv) Forensic Serology Column II: (P) Firearms & Ammunition (Q) Poisons & Drugs (R) Blood & Body Fluids (S) Teeth & Bite Marks (a) i-Q, ii-P, iii-S, iv-R (b) i-P, ii-Q, iii-R, iv-S (c) i-R, ii-S, iii-P, iv-Q (d) i-Q, ii-S, iii-P, iv-R Marks: 1 | Syllabus Mapping: Unit 1 – Scope and Branches of Forensic Science | Difficulty: Moderate | Cognitive Level: Understand | Competency: Conceptual Understanding Learning Hint: Revise the scope and subject matter covered under each branch of forensic science.
A5. A crime scene that is enclosed within a building or structure is classified as a/an: (a) Outdoor crime scene (b) Indoor crime scene (c) Secondary crime scene (d) Microscopic crime scene Marks: 1 | Syllabus Mapping: Unit 2 – Classification of Crime Scene | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the classification criteria for indoor, outdoor, primary, secondary, macroscopic and microscopic crime scenes.
A6. The place where a crime actually occurred is termed the: (a) Secondary crime scene (b) Primary crime scene (c) Associative scene (d) Transfer scene Marks: 1 | Syllabus Mapping: Unit 2 – Classification of Crime Scene | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the distinction between primary and secondary crime scenes with examples.
A7. Trace evidence such as hair, fibres and gunshot residue that require microscopic examination fall under the category of: (a) Macroscopic crime scene evidence (b) Microscopic crime scene evidence (c) Testimonial evidence (d) Documentary evidence Marks: 1 | Syllabus Mapping: Unit 2 – Macroscopic & Microscopic Crime Scenes | Difficulty: Moderate | Cognitive Level: Understand | Competency: Conceptual Understanding Learning Hint: Revise the distinction between macroscopic and microscopic crime scene evidence.
A8. Which of the following best defines “Physical Evidence” in a forensic context? (a) Only oral testimony of witnesses (b) Any tangible object that establishes a link between crime, victim and criminal (c) Only documents recovered from the scene (d) Only biological fluids found at the scene Marks: 1 | Syllabus Mapping: Unit 2 – Definition of Physical Evidence | Difficulty: Easy | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the definition, classification and evidentiary value of physical evidence.
A9. The unbroken chronological record of seizure, custody, control, transfer, and disposition of physical evidence is known as: (a) Crime scene reconstruction (b) Chain of custody (c) Evidence linkage (d) Forensic audit Marks: 1 | Syllabus Mapping: Unit 2 – Chain of Custody | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the concept, purpose and legal significance of chain of custody documentation.
A10. In cases of fire and arson, which evidence is of primary significance to establish the use of an accelerant? (a) Fingerprints on furniture (b) Presence of ignitable liquid residue patterns (c) Blood spatter pattern (d) Handwriting on a note Marks: 1 | Syllabus Mapping: Unit 2 – Crime Scene relating to Fire and Arson | Difficulty: Moderate | Cognitive Level: Apply | Competency: Technical Application Learning Hint: Revise crime scene indicators and evidence significant to fire and arson investigations.
A11. In mass disaster investigation, the process by which recovered human remains are matched to individual identities is central to: (a) Crime scene reconstruction only (b) Victim identification (c) Chain of custody only (d) Ballistic comparison Marks: 1 | Syllabus Mapping: Unit 2 – Crime Scene relating to Mass Disaster | Difficulty: Moderate | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the special considerations and procedures applicable to mass disaster crime scenes.
A12. Which of the following is an essential principle while packaging biological evidence such as bloodstained material? (a) Airtight plastic packaging to preserve moisture (b) Breathable paper packaging to prevent microbial degradation (c) No packaging is required for biological evidence (d) Packaging in metal containers only Marks: 1 | Syllabus Mapping: Unit 2 – Collection, Preservation, Packaging of Material | Difficulty: Moderate | Cognitive Level: Apply | Competency: Technical Application Learning Hint: Revise appropriate collection, preservation and packaging protocols for different evidence types.
A13. “Crime Scene Reconstruction” primarily involves: (a) Randomly rearranging objects at the scene (b) Using physical evidence and scientific analysis to establish the sequence of events (c) Photographing the scene only (d) Interviewing the accused exclusively Marks: 1 | Syllabus Mapping: Unit 2 – Reconstruction of Crime Scene | Difficulty: Moderate | Cognitive Level: Understand | Competency: Conceptual Understanding Learning Hint: Revise the principles, methods and evidentiary basis of crime scene reconstruction.
A14. Which of the following tools would be MOST relevant during a systematic crime scene search? (a) Grid/strip search pattern equipment and evidence markers (b) Only a notebook and pen (c) Only a camera without measuring tools (d) None of the above Marks: 1 | Syllabus Mapping: Unit 2 – Tools and Techniques in Crime Scene Search | Difficulty: Easy | Cognitive Level: Understand | Competency: Technical Application Learning Hint: Revise standard crime scene search patterns and the tools/techniques used at the scene.
A15. Ethical conduct at a crime scene primarily requires the investigator to: (a) Alter evidence to strengthen the prosecution’s case (b) Maintain objectivity, avoid contamination, and ensure accurate documentation (c) Share scene details with unauthorized persons (d) Skip documentation to save time Marks: 1 | Syllabus Mapping: Unit 2 – Significance and Ethics of Crime Scene | Difficulty: Easy | Cognitive Level: Understand | Competency: Professional Judgment Learning Hint: Revise ethical obligations and professional conduct expected at a crime scene.
A16. Which measure of central tendency is defined as the value that occurs most frequently in a data set? (a) Mean (b) Median (c) Mode (d) Standard Deviation Marks: 1 | Syllabus Mapping: Unit 3 – Mean, Median, Mode | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the definitions and calculation methods of mean, median and mode.
A17. Probability of an event is best defined as: (a) The certainty of an event occurring (b) The ratio of favourable outcomes to total possible outcomes (c) The average value of a data set (d) The variability of a data set Marks: 1 | Syllabus Mapping: Unit 3 – Basic Principles of Statistics – Probability | Difficulty: Easy | Cognitive Level: Remember | Competency: Subject Knowledge Learning Hint: Revise the fundamental definition and axioms of probability.
A18. The Chi-square test is primarily used to: (a) Compare two population means (b) Test the association/independence between categorical variables or goodness of fit (c) Measure central tendency (d) Measure dispersion only Marks: 1 | Syllabus Mapping: Unit 3 – Chi Square Test | Difficulty: Moderate | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the purpose, assumptions and applications of the Chi-square test.
A19. The F-Test is primarily employed to compare: (a) Two sample means directly (b) The variances of two populations/samples (c) Two medians (d) Two modes Marks: 1 | Syllabus Mapping: Unit 3 – F-Test | Difficulty: Moderate | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the purpose, assumptions and application of the F-test in comparing variances.
A20. Which of the following statements about the Median is correct? (a) It is always equal to the Mean (b) It is the middle value of an ordered data set (c) It is the most frequently occurring value (d) It cannot be calculated for an odd number of observations Marks: 1 | Syllabus Mapping: Unit 3 – Mean, Median, Mode | Difficulty: Easy | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the method of calculating the median for odd and even numbered data sets.
SECTION B — Short Answer Questions (10 × 3 = 30 Marks)
B1. Explain the scope of Forensic Science and briefly discuss any three of its branches. Marks: 3 | Syllabus Mapping: Unit 1 – Scope and Branches of Forensic Science | Difficulty: Easy | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the definition, scope and major branches of forensic science with their functions.
B2. Discuss the key milestones in the development of Forensic Science in India. Marks: 3 | Syllabus Mapping: Unit 1 – Development of Forensic Science in India | Difficulty: Moderate | Cognitive Level: Understand | Competency: Subject Knowledge Learning Hint: Revise the historical development and institutional growth of forensic science in India.
B3. Differentiate between a Primary Crime Scene and a Secondary Crime Scene with suitable examples. Marks: 3 | Syllabus Mapping: Unit 2 – Classification of Crime Scene | Difficulty: Moderate | Cognitive Level: Analyse | Competency: Analytical Ability Learning Hint: Revise classification of crime scenes and illustrative examples of each category.
B4. Explain the significance and evidentiary value of physical evidence in linking the crime scene, victim and criminal. Marks: 3 | Syllabus Mapping: Unit 2 – Physical Evidence – Significance and Value | Difficulty: Moderate | Cognitive Level: Understand | Competency: Conceptual Understanding Learning Hint: Revise the concept of evidentiary linkage (Locard’s principle context) as covered under physical evidence.
B5. Discuss the precautions to be taken during the collection and preservation of physical evidence at a crime scene. Marks: 3 | Syllabus Mapping: Unit 2 – Collection, Preservation, Packaging of Material | Difficulty: Moderate | Cognitive Level: Apply | Competency: Technical Application Learning Hint: Revise standard protocols for collection, preservation and packaging of different evidence categories.
B6. Explain the importance of maintaining Chain of Custody and the safety measures required at the crime scene and in the laboratory. Marks: 3 | Syllabus Mapping: Unit 2 – Chain of Custody and Safety Measures | Difficulty: Moderate | Cognitive Level: Understand | Competency: Professional Judgment Learning Hint: Revise chain of custody documentation requirements and laboratory/scene safety protocols.
B7. Discuss the special considerations involved in investigating a crime scene relating to a mass disaster. Marks: 3 | Syllabus Mapping: Unit 2 – Crime Scene relating to Mass Disaster | Difficulty: Difficult | Cognitive Level: Analyse | Competency: Analytical Ability Learning Hint: Revise the challenges, procedures and evidence handling specific to mass disaster scenes.
B8. Explain how a forensic investigator distinguishes a scene of homicide from a scene of suicide based on scene indicators. Marks: 3 | Syllabus Mapping: Unit 2 – Crime Scene relating to Homicide, Suicide, Murder | Difficulty: Difficult | Cognitive Level: Analyse | Competency: Analytical Ability Learning Hint: Revise distinguishing scene indicators associated with homicide, suicide and murder investigations.
B9. Explain the concept of probability and its relevance to forensic data interpretation. Marks: 3 | Syllabus Mapping: Unit 3 – Probability | Difficulty: Moderate | Cognitive Level: Understand | Competency: Research Aptitude Learning Hint: Revise the basic principles of probability and its role in interpreting forensic findings.
B10. Differentiate between Mean, Median and Mode as measures of central tendency, indicating situations where each is most appropriately used. Marks: 3 | Syllabus Mapping: Unit 3 – Mean, Median, Mode | Difficulty: Moderate | Cognitive Level: Analyse | Competency: Analytical Ability Learning Hint: Revise the definitions, formulae and comparative applicability of mean, median and mode.
SECTION C — Analytical / Numerical / Technical Questions (6 × 5 = 30 Marks)
C1. A crime scene investigator arrives at an indoor scene involving a suspected gas explosion. Outline, in a logical sequence, the tools, techniques and search strategy that should be employed to systematically process this scene while preserving physical evidence. Marks: 5 | Syllabus Mapping: Unit 2 – Tools and Techniques in Crime Scene Search; Crime Scene relating to Gas Explosion | Difficulty: Difficult | Cognitive Level: Apply | Competency: Technical Application Learning Hint: Revise systematic crime scene search techniques and their application to explosion/fire scenes.
C2. During the investigation of a case, evidence collected from the scene was found to have a break in its documented chain of custody before reaching the laboratory. Analyse the implications of this lapse and suggest the corrective safety and documentation measures that should be institutionalized to prevent recurrence. Marks: 5 | Syllabus Mapping: Unit 2 – Chain of Custody and Safety Measures | Difficulty: Difficult | Cognitive Level: Analyse | Competency: Problem Solving Learning Hint: Revise chain-of-custody protocols, documentation standards and consequences of procedural lapses.
C3. In a data set of examination scores: 12, 15, 18, 15, 20, 15, 22, 18, calculate the Mean, Median and Mode. Marks: 5 | Syllabus Mapping: Unit 3 – Mean, Median, Mode | Difficulty: Moderate | Cognitive Level: Apply | Competency: Numerical Skills Learning Hint: Revise the step-by-step calculation procedures for mean, median and mode of a given data set.
C4. A bag contains 5 red balls, 3 blue balls and 2 green balls. Calculate the probability of drawing (i) a red ball, and (ii) either a blue or a green ball, in a single draw. Marks: 5 | Syllabus Mapping: Unit 3 – Probability | Difficulty: Moderate | Cognitive Level: Apply | Competency: Numerical Skills Learning Hint: Revise the classical definition of probability and rules for computing probability of combined events.
C5. Given observed and expected frequencies for a categorical data set, describe the step-by-step procedure to compute the Chi-square statistic and explain how the result would be interpreted against a critical value at a given significance level. Marks: 5 | Syllabus Mapping: Unit 3 – Chi Square Test | Difficulty: Difficult | Cognitive Level: Apply | Competency: Numerical Skills Learning Hint: Revise the Chi-square formula, degrees of freedom determination and interpretation of results.
C6. Two independent samples yield different variances. Describe the procedure to apply the F-Test to determine whether the difference in variances is statistically significant, and explain how the computed F-value would be interpreted. Marks: 5 | Syllabus Mapping: Unit 3 – F-Test | Difficulty: Difficult | Cognitive Level: Evaluate | Competency: Numerical Skills Learning Hint: Revise the F-test formula, assumptions, degrees of freedom and interpretation against critical F-values.
SECTION D — Long Answer / Research / Case Study / Professional Application Questions (2 × 10 = 20 Marks)
D1. Critically examine the definition, principles and scope of Forensic Science, and discuss how its various branches integrate to support criminal investigation. Support your answer with a discussion on the historical development of Forensic Science in India. Marks: 10 | Syllabus Mapping: Unit 1 – Introduction, Definition, Principles, Scope, Branches, Development of Forensic Science in India | Difficulty: Difficult | Cognitive Level: Evaluate | Competency: Critical Thinking Learning Hint: Revise the complete conceptual framework of forensic science — definition, principles, scope, branches — along with its developmental history in India.
D2. You are the first Scientific Officer to reach the scene of a suspected murder that occurred indoors, with signs suggesting possible mass-casualty implications due to a fire that broke out subsequently. Design a comprehensive crime scene management plan covering scene classification, physical evidence identification, search strategy, collection and packaging, chain of custody, safety measures, and scene reconstruction, justifying each step. Marks: 10 | Syllabus Mapping: Unit 2 – Crime Scene Classification, Physical Evidence, Tools & Techniques, Collection/Preservation/Packaging, Reconstruction, Chain of Custody, Safety Measures, Crime Scene relating to Fire and Homicide/Mass Disaster | Difficulty: Difficult | Cognitive Level: Create/Design | Competency: Professional Judgment Learning Hint: Revise integrated crime scene management principles spanning classification, evidence handling, safety, and reconstruction for complex/composite scenes.
EXAM BLUEPRINT
1. Syllabus Coverage Matrix
| Syllabus Unit | Questions | Coverage |
|---|---|---|
| Unit 1: Introduction, Definition, Principles, Scope & Branches of Forensic Science; Development in India | A1–A4, B1–B2, D1 (7) | ✓ Covered |
| Unit 2: Crime Scene Investigation & Physical Evidence | A5–A15, B3–B8, C1–C2, D2 (19) | ✓ Covered |
| Unit 3: Basic Principles of Statistics | A16–A20, B9–B10, C3–C6 (12) | ✓ Covered |
| Total | 38 |
2. Professional Competency Matrix
| Competency | Number of Questions |
|---|---|
| Subject Knowledge | 10 |
| Conceptual Understanding | 6 |
| Analytical Ability | 6 |
| Problem Solving | 1 |
| Numerical Skills | 5 |
| Technical Application | 5 |
| Professional Judgment | 3 |
| Critical Thinking | 1 |
| Research Aptitude | 1 |
| Total | 38 |
3. Difficulty Distribution
| Difficulty | Number | Percentage |
|---|---|---|
| Easy | 10 | 26% |
| Moderate | 18 | 47% |
| Difficult | 10 | 27% |
4. Bloom’s Taxonomy Distribution
| Cognitive Level | Number | Percentage |
|---|---|---|
| Remember | 5 | 13% |
| Understand | 12 | 32% |
| Apply | 9 | 24% |
| Analyse | 6 | 16% |
| Evaluate | 4 | 10% |
| Create/Design | 2 | 5% |
5. Directive Verb Distribution
| Directive Verb | Frequency |
|---|---|
| Explain | 6 |
| Discuss | 5 |
| Differentiate | 2 |
| Describe | 2 |
| Analyse/Analyze | 1 |
| Critically Examine | 1 |
| Design | 1 |
| Calculate | 1 |
| Outline | 1 |
| Others (Objective Stems) | 20 |
6. Question Type Distribution
| Question Type | Count |
|---|---|
| MCQ | 17 |
| Assertion–Reason | 1 |
| Match the Following | 1 |
| Match the Following | 1 |
| Short Answer | 10 |
| Numerical | 3 |
| Analytical/Technical | 3 |
| Case Study / Design | 1 |
| Long Answer/Critical Essay | 1 |
7. Overall Validation
| Quality Parameter | Status |
|---|---|
| Complete Syllabus Coverage | ✓ |
| Balanced Unit Coverage | ✓ |
| Balanced Difficulty | ✓ |
| Bloom’s Taxonomy Coverage | ✓ |
| Professional Competency Coverage | ✓ |
| Conceptual & Application Balance | ✓ |
| Research Orientation | ✓ |
| No Duplicate Questions | ✓ |
| No Out-of-Syllabus Questions | ✓ |
| Recruitment-Level Standard | ✓ |
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