UPSSSC Forensic Science Laboratory Physics, Chemistry, Biology & Mathematics MCQ Practice

UPSSSC Advt 15-Exam/2026 — Physics, Chemistry, Biology, and Mathematics together account for 40 questions (40 marks) in Part-1 of the UPSSSC FSL Main Exam. This practice set provides 10 MCQs per subject at B.Sc. graduate level, covering the core topics from the official syllabus. Answer key at the bottom.

Subject Weightage in Part-1 (Subject Related Knowledge)

These four subjects contribute 40% of the total exam marks. Scoring well here is essential for a competitive rank.

Section A: Physics (10 Questions)

1. Newton's second law of motion states that force is equal to:

• Mass × Velocity
• Mass × Acceleration
• Mass × Displacement
• Mass × Time

2. The focal length of a convex lens is 20 cm. Its power in dioptres is:

• 2 D
• 0.5 D
• 5 D
• 0.2 D

Power (P) = 1/focal length (in metres). f = 20 cm = 0.2 m. P = 1/0.2 = 5 D.

3. Which of the following is a scalar quantity?

• Force
• Velocity
• Work
• Acceleration

4. The SI unit of electrical resistance is:

• Volt
• Ampere
• Coulomb
• Ohm

5. The first law of thermodynamics is based on the principle of:

• Conservation of momentum
• Conservation of energy
• Conservation of mass
• Conservation of charge

6. In a simple harmonic motion, the acceleration is maximum at:

• Mean position
• Extreme positions
• Halfway between mean and extreme
• Throughout the motion

7. The phenomenon of splitting of white light into its component colours is called:

• Reflection
• Refraction
• Dispersion
• Diffraction

8. Which of the following has the shortest wavelength?

• Radio waves
• Microwaves
• Infrared
• Gamma rays

9. The value of acceleration due to gravity (g) is maximum at:

• The centre of the Earth
• The top of Mount Everest
• The surface of the Earth at the poles
• The equator

10. The efficiency of a Carnot engine depends on:

• The working substance
• The temperatures of the source and sink
• The design of the engine
• The pressure of the working substance

Section B: Chemistry (10 Questions)

11. Which of the following elements has the highest electronegativity?

• Sodium
• Chlorine
• Fluorine
• Oxygen

12. The hybridisation of carbon in methane (CH₄) is:

• sp
• sp²
• sp³
• dsp²

13. Which functional group is present in carboxylic acids?

• -OH
• -COOH
• -CHO
• -NH₂

14. The pH of a neutral solution at 25°C is:

• 0
• 7
• 14
• 1

15. In the periodic table, the element with atomic number 17 belongs to which group?

• Group 1
• Group 2
• Group 17 (Halogens)
• Group 18

16. Which of the following is an example of a coordination compound?

• NaCl
• K₃[Fe(CN)₆]
• H₂SO₄
• CH₃COOH

17. The rate of a chemical reaction is expressed in terms of:

• Change in concentration per unit temperature
• Change in concentration per unit time
• Change in temperature per unit time
• Change in pressure per unit volume

18. Which of the following is NOT a type of chromatography?

• Thin Layer Chromatography (TLC)
• Gas Chromatography (GC)
• Column Chromatography
• Thermal Conductivity Chromatography

19. The process of electrolysis is based on:

• Faraday's laws of electromagnetic induction
• Faraday's laws of electrolysis
• Newton's laws of motion
• Henry's law

20. Which quantum number determines the shape of an orbital?

• Principal quantum number (n)
• Azimuthal quantum number (l)
• Magnetic quantum number (m)
• Spin quantum number (s)

Section C: Biology (10 Questions)

21. The powerhouse of the cell is the:

• Nucleus
• Ribosome
• Mitochondria
• Golgi apparatus

22. Which of the following is responsible for protein synthesis?

• Lysosome
• Ribosome
• Centrosome
• Vacuole

23. Mitosis results in the production of:

• Four genetically different daughter cells
• Two genetically identical daughter cells
• Four genetically identical daughter cells
• Two genetically different daughter cells

24. The normal resting heart rate for an adult human is approximately:

• 40–50 beats per minute
• 60–100 beats per minute
• 120–150 beats per minute
• 150–180 beats per minute

25. Which enzyme is responsible for digesting proteins in the stomach?

• Amylase
• Lipase
• Pepsin
• Maltase

26. The ABO blood group system is determined by the presence of:

• Antigens on the surface of red blood cells
• Antibodies in the plasma
• Haemoglobin variants
• White blood cell count

27. DNA replication is:

• Semiconservative
• Conservative
• Dispersive
• Random

28. Which vitamin is produced when the skin is exposed to sunlight?

• Vitamin A
• Vitamin B
• Vitamin D
• Vitamin C

29. Gram-positive bacteria stain which colour in the Gram staining procedure?

• Purple (violet)
• Pink (red)
• Colourless
• Green

30. The smallest bone in the human body is the:

• Femur
• Patella
• Stapes (in the middle ear)
• Phalanx

Section D: Mathematics (10 Questions)

31. The derivative of x² with respect to x is:

• x
• 2x
• 2
• x²/2

32. The value of sin 90° is:

• 0
• 1
• 0.5
• √3/2

33. If the mean of five numbers is 10, what is the sum of the numbers?

• 2
• 10
• 50
• 100

Sum = Mean × Number of observations = 10 × 5 = 50

34. The probability of getting a head when a fair coin is tossed is:

• 0
• 0.5
• 1
• 0.25

35. The roots of the quadratic equation x² – 5x + 6 = 0 are:

• 2 and 3
• –2 and –3
• 1 and 6
• 2 and 3

x² – 5x + 6 = (x – 2)(x – 3) = 0 ⇒ x = 2, 3

36. The distance between points (0, 0) and (3, 4) in a coordinate plane is:

• 5
• 7
• 1
• 5

Distance = √((3-0)² + (4-0)²) = √(9+16) = √25 = 5

37. What is the mode of the data set: 2, 3, 5, 3, 7, 3, 9?

• 2
• 3
• 5
• 7

38. A circle has a radius of 7 cm. Its area is (π = 22/7):

• 44 cm²
• 22 cm²
• 77 cm²
• 154 cm²

Area = πr² = (22/7) × 7 × 7 = 154 cm²

39. Which of the following matrices is an identity matrix of order 2?

• [[1, 0], [0, 1]]
• [[0, 1], [1, 0]]
• [[1, 1], [0, 1]]
• [[0, 0], [0, 0]]

40. The value of log₁₀ 1000 is:

• 1
• 3
• 2
• 10

log₁₀ 1000 = log₁₀ 10³ = 3

Answer Key

Physics (Q1–Q10)

Chemistry (Q11–Q20)

Biology (Q21–Q30)

Mathematics (Q31–Q40)

Subject-Wise Performance Tracker

Common Exam Traps

Trap 1: SI Units Confusion

Trap: Confusing SI units — e.g., writing 'Gram' for mass (SI unit is kilogram) or 'Newton' for weight. Truth: Memorise the base SI units: Mass (kg), Length (m), Time (s), Current (A), Temperature (K).

Trap 2: Organic vs Inorganic in Chemistry

Trap: Assuming all carbon-containing compounds are organic (CO₂, carbonates, and bicarbonates are inorganic). Truth: Only compounds with C–H bonds are classified as organic.

Trap 3: Mitosis vs Meiosis

Trap: Confusing the products — Mitosis produces 2 identical diploid cells; Meiosis produces 4 genetically different haploid cells. Truth: Mitosis = Growth & Repair; Meiosis = Gamete formation.

Trap 4: Trigonometric Ratios

Trap: Mixing up sin 0°, sin 90°, cos 0°, cos 90°. Truth: sin 0° = 0, sin 90° = 1, cos 0° = 1, cos 90° = 0. Use the unit circle to derive these.

Trap 5: Mean vs Median vs Mode

Trap: Using the wrong measure of central tendency. Truth: Mean = sum/ count; Median = middle value when sorted; Mode = most frequent value.

Preparation Strategy for Subject Knowledge (Part-1)

Recommended Preparation Flow

1. Revise B.Sc. level textbooks — focus on fundamental concepts
2. Practice numerical problems — Physics & Mathematics require numerical accuracy
3. Create mnemonics — for biological classifications and chemical reactions
4. Solve previous year papers — of similar-level UPSSSC exams
5. Attempt timed mock tests — 40 questions in 40 minutes

Bookmark this page for more practice sets and exam updates. For complete UPSSSC FSL preparation resources, visit ExamRankCheck.

Also check our Forensic Science MCQ Practice (25 marks) and Computer & IT + UP GK Guide (35 marks) for comprehensive coverage of the entire syllabus.