🏫 CSS General Science and Ability Past Paper February 2025
The CSS General Science and Ability exam is a critical component of the Central Superior Services (CSS) examination in Pakistan. The February 2025 paper tests candidates’ grasp of scientific concepts, environmental issues, technological advancements, and quantitative reasoning. Below is a detailed breakdown of the paper’s structure, key topics, and strategies for effective preparation.
CSS Past Paper February 2025 - General Science
📌 CSS Paper 2025 General Knowlede - Overview
Total Marks:
100
Total MCQs:
20
Part 1:
MCQ’s
Part 2:
Descriptive
🌟 CSS General Science and Ability Past Paper 2025
Part-I (MCQs)
- Marks: 20 marks (20×1)
- Topics Covered: Astronomy, Earth Sciences, Biology, Nutrition, Computer Science, Environmental Science30-minute time limit
- No negative marking
- Answers on OMR sheet only
Part-II (Descriptive)
- Section A (Science): Earth Science, Biology, Environment, Technology
- Section B (Ability): Math, Logical Reasoning, Language
📄 CSS General Science and Ability Paper 2025 MCQs Solution
1. 'Blue dwarfs' and 'Red giants' respectively refer to:
a
Moons of Jupiter
b
Young star and Old star
c
Old star and Young star
d
None of these
Answer: b. Blue dwarfs are low-mass stars evolving into red giants in later
stages.
2. Most major Tsunamis are produced by earthquakes with hypocenters less than:
a
30 km
b
40 km
c
50 km
d
None of these
Answer: a. Most tsunamis originate from shallow hypocenters (less than 30 km
depth).
3. Which of the following source of energy is caused by uneven heating of earth's surface?
a
Wind
b
Solar
c
Biomass
d
None of these
Answer: a. Wind energy arises from temperature-driven air movement.
4. Global winds towards western direction are known as:
a
Trade winds
b
Western winds
c
Reynolds wind
d
None of these
Answer: b. Westerlies are global winds blowing from the west toward the east.
5. Perinatal transmission is said to occur when a pathogen is transmitted from:
a
Non-human to human
b
Infected to uninfected
c
Mother to infant
d
None of these
Answer: c. Perinatal transmission occurs during birth or shortly after.
6. Which plant group needs both land and water to complete their life cycle?
a
Bryophyta
b
Tracheophyta
c
Algae
d
None of these
Answer: a. Bryophytes (e.g., mosses) require moisture for reproduction.
7. Maximum amount of carbohydrates are obtained from:
a
Nuts
b
Plant oil
c
Grains
d
None of these
Answer: c. Grains like rice and wheat are rich in carbohydrates.
8. Which of the following class has the largest number of animals?
a
Fishes
b
Insects
c
Mammals
d
None of these
Answer: b. Insecta (insects) is the largest animal class.
9. The process of preserving meat by stewing in a covered earthenware jug is called:
a
Burial
b
Jugging
c
Curing
d
Smoking
Answer: b. Jugging involves slow-cooking meat in a sealed jug.
10. All operating systems get their total memory initialized from:
a
BIOS
b
RAM
c
ROM
d
CPU
Answer: a. BIOS initializes hardware during boot-up.
11. The amount of data transmitted for a given amount of time is called:
a
Noise
b
Bandwidth
c
Frequency
d
None of these
Answer: b. Bandwidth measures data transfer capacity over time.
12. Which of the following products can be prepared using raw guava?
a
Jam
b
Jelly
c
Both (a) and (b)
d
None of these
Answer: c. Guava is used for jams and jelly due to its pectin content.
13. Which of the following is used as a stabilizer in ice cream?
a
Milk
b
Gelatin
c
Sugar
d
None of these
Answer: b. Gelatin prevents ice crystallization in ice cream.
14. In the structure of fiber, the light is guided through the core due to total internal:
a
Refraction
b
Reflection
c
Diffraction
d
None of these
Answer: b. Total internal reflection traps light in fiber optics.
15. Who is known as the inventor of Artificial Intelligence?
a
Charles Babbage
b
John McCarthy
c
Alan Turing
d
None of these
Answer: b. John McCarthy coined the term "Artificial Intelligence."
16. Which of the following is the common language for Artificial Intelligence?
a
Java
b
Python
c
Lisp
d
None of these
Answer: c. Lisp is historically significant in AI development.
17. Cement factory laborers are prone to:
a
Leukemia
b
Cytosilicosis
c
Bone marrow disease
d
None of these
Answer: b. Prolonged silica dust exposure causes cytosilicosis (silicosis).
18. The fastest enzyme is:
a
Pepsin
b
DNA polymerase
c
Carbonic anhydrase
d
None of these
Answer: c. Carbonic anhydrase catalyzes reactions at millions per second.
19. Process of adding vitamins to milk is known as:
a
Flavoring
b
Fortification
c
Fermentation
d
None of these
Answer: b. Fortification enhances nutritional value.
20. The waves used for line of sight (LOS) communication are called:
a
Space waves
b
Cable waves
c
Antenna waves
d
None of these
Answer: a. Space waves travel directly between transmitter and receiver.
📝 CSS General Science and Ability Paper 2025 - Descriptive Paper
📝 CSS General Science and Ability Paper 2025 - Descriptive Paper (Section A)
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📝 CSS General Science and Ability Paper 2025 - Descriptive Paper (Section B)
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🔗 Preparation Strategies
Master Interdisciplinary Topics: Focus on astronomy, environmental science, and human biology.
Practice Problem-Solving: Sharpen algebra, percentage calculations, and geometry skills for Section B.
Understand Current Trends: AI (Q15–16), optical fibers (Q5d), and pollution impacts (Q4c) reflect modern issues.
Time Management: Allocate 30 minutes strictly for MCQs; prioritize clarity in descriptive answers.
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