Senior Scientific Officer (Documents) (Advt. No. 13/2025) held on 07.11.2025 (Morning Session)

Q1. CANDIDATE COPY II) Write a detailed note on the historical evolution of the Frye and Daubert standards and 10 1. their impact on the courtroom admissibility of forensic document examination evidence. State the condition under which a charged particle moving through perpendicular 10

Q2.

(a) electric and magnetic fields remains undeflected, and explain how this principle is applied in a velocity selector of a mass spectrometer. suport E : smill DEI FENTEN EINDICHT 3. A complex organic mixture shows overlapping CH and NH stretching vibrations. 5^\circ

(b) Discuss the significance of FTIR in resolving and quantifying the overlapping CH and NH stretching vibrations in such complex organic mixture over a dispersive IR spectrophotometer. Discuss how can Raman spectroscopy be applied non-destructively to detect 5 3. alterations in documents or artworks. The contract of the property of the contract of the contract of the contract of the contract of the contract of the contract of the contract of the contract of the contract of the cont A GC analysis of a complex mixture shows very fast-eluting peaks, but the current FID 10 4. cannot resolve them properly. As an analyst, suggest which detector(s) could solve this problem and justify your choice based on response time, sensitivity, and selectivity. A building suspected of being used for illegal activities caught fire. The investigators 10 5. recovered fully as well as partially burnt documents. As a forensic document examiner, explain the procedures for collecting, preserving, and recovering the illegible contents from such fragile documents. Explain in detail the working principle and role of hyperspectral imaging with 6. multivariate analysis in examination of questioned documents. Also highlight the limitations related to it. sia fit adap stice. S spa In a case of anonymous threatening letters, multiple handwriting samples from potential suspects are available. Design a comprehensive forensic protocol combining qualitative and quantitative analyses to determine authorship with high confidence. COT 2025 2 es FOO

Q3.

(a) A complex organic mixture shows overlapping CH and NH stretching vibrations. Discuss the significance of FTIR in resolving and quantifying the overlapping CH and NH stretching vibrations in such complex organic mixture over a dispersive IR spectrophotometer.

Q4.

(b) Discuss how Raman spectroscopy can be applied non-destructively to detect alterations in documents or artworks.

Q5. A GC analysis of a complex mixture shows very fast-eluting peaks, but the current FID cannot resolve them properly. As an analyst, suggest which detector(s) could solve this problem and justify your choice based on response time, sensitivity, and selectivity.

Q6. A building suspected of being used for illegal activities caught fire. The investigators recovered fully as well as partially burnt documents. As a forensic document examiner, explain the procedures for collecting, preserving, and recovering the illegible contents from such fragile documents.

Q7. Explain in detail the working principle and role of hyperspectral imaging with multivariate analysis in examination of questioned documents. Also highlight the limitations related to it.

Q8. In a case of anonymous threatening letters, multiple handwriting samples from potential suspects are available. Design a comprehensive forensic protocol combining qualitative and quantitative analyses to determine authorship with high confidence.