Everyday Science MCQs for PPSC, FPSC & CSS — 100 Most Repeated Questions with Answers

100 most repeated Everyday Science MCQs for PPSC, FPSC and CSS — physics, chemistry, biology, space and technology, with examiner tips and revision plan.

By Muhammad Younus · Updated 02 Nov 2026 · 12 min read

Everyday Science is the most scoring part of a one-paper test — and the most neglected. The questions look simple, but they are spread across physics, chemistry, biology, the environment and everyday technology, so a candidate who only revises one branch leaves easy marks on the table. This post collects 100 of the most repeated Everyday Science MCQs for PPSC, FPSC and CSS screening tests, grouped by branch, with a short explanation of how examiners twist each topic.

Read each question first, cover the answer, and say it aloud before checking. A first pass for learning and a second pass the next day will fix far more facts than reading the same list five times in one sitting.

Physics — Everyday Science MCQs

1. What is the SI unit of force? — Newton (N)
2. What is the approximate speed of light in a vacuum? — About 300,000 kilometres per second
3. What is the SI unit of electric current? — Ampere (A)
4. Which instrument measures atmospheric pressure? — Barometer
5. Sound travels fastest through which state of matter? — Solids (for example, steel) — faster than in liquids, and slowest in gases
6. What is the boiling point of pure water at sea level? — 100°C
7. What is the freezing point of pure water? — 0°C
8. What is the SI unit of power? — Watt (W)
9. One horsepower is equal to how many watts? — 746 watts
10. An echo is caused by what property of sound? — Reflection of sound waves
11. What is a light year a unit of? — Distance — the distance light travels in one year
12. A rainbow is formed by which action of sunlight on raindrops? — Refraction and dispersion (splitting) of sunlight, with internal reflection inside the drops
13. In reflection, how does the angle of incidence compare with the angle of reflection? — They are equal
14. Which type of mirror is used in car headlights and torches to focus light into a beam? — Concave mirror
15. Which type of mirror is used as a vehicle's rear-view mirror, because it gives a wider view? — Convex mirror
16. When white light passes through a prism, it splits into seven colours. What is this called? — Dispersion of light
17. What are the three primary colours of light? — Red, green and blue
18. What is the SI unit of frequency? — Hertz (Hz)
19. What is the SI unit of work and energy? — Joule (J)
20. What is the SI unit of pressure? — Pascal (Pa)
21. Sound with a frequency above 20,000 hertz is called what? — Ultrasonic sound
22. A dynamo converts which form of energy into which? — Mechanical energy into electrical energy
23. Why is fuse wire made of a tin-lead alloy? — Because it has a low melting point, so it melts and breaks the circuit before a current surge damages appliances
24. At what temperature is water at its maximum density? — 4°C
25. Why does the boiling point of water fall at high altitude, for example in Murree? — Because atmospheric pressure is lower there, so water needs less heat to boil

Chemistry — Everyday Science MCQs

1. What is the chemical formula of water? — H2O
2. What is the chemical name of common salt? — Sodium chloride (NaCl)
3. What is the chemical symbol of gold? — Au
4. What is the chemical symbol of silver? — Ag
5. What is the chemical symbol of iron? — Fe
6. Diamond, the hardest naturally occurring substance, is an allotrope (form) of which element? — Carbon
7. Which form of carbon is used as pencil lead and also conducts electricity? — Graphite
8. What is the chemical name of baking soda? — Sodium bicarbonate (NaHCO3)
9. What is the chemical name of washing soda? — Sodium carbonate
10. Which acid is present in vinegar? — Acetic acid
11. Which acid is present in lemons and oranges? — Citric acid
12. What is the pH value of a neutral solution, such as pure water? — 7 (acids are below 7, bases above 7)
13. Which acid is present in the human stomach and helps digest food? — Hydrochloric acid
14. Rusting of iron needs which two things besides iron itself? — Oxygen and moisture — the product is hydrated iron oxide
15. What is dry ice? — Solid carbon dioxide
16. Which gas is called laughing gas? — Nitrous oxide (N2O)
17. What is the main component of natural gas? — Methane
18. LPG (liquefied petroleum gas) used in cylinders mainly consists of which gases? — Propane and butane
19. Why is carbon dioxide used in fire extinguishers? — Because it does not support combustion and is heavier than air, so it blankets the flame and cuts off oxygen
20. Which gas is necessary for burning (combustion)? — Oxygen
21. In photosynthesis, plants use carbon dioxide and water, with sunlight, to make what two products? — Glucose (food) and oxygen
22. What is the green pigment in leaves that captures sunlight for photosynthesis? — Chlorophyll
23. What is the smallest particle of an element that keeps the chemical properties of that element? — An atom
24. What does the atomic number of an element tell you? — The number of protons in the nucleus of its atom
25. Bleaching powder is commonly used for what purpose in water supply? — Disinfecting drinking water

Biology and the Human Body — Everyday Science MCQs

1. What is the normal temperature of the human body? — About 37°C (98.6°F)
2. What is the average resting heartbeat of a healthy adult? — About 72 beats per minute
3. What is the average lifespan of a red blood cell? — About 120 days
4. Which iron-containing pigment in red blood cells carries oxygen around the body? — Haemoglobin
5. Which blood group is called the universal donor? — O negative (O–)
6. Which blood group is called the universal recipient? — AB positive (AB+)
7. How many bones are there in the adult human body? — 206
8. Which is the largest (longest and strongest) bone in the human body? — The femur (thigh bone)
9. Which is the smallest bone in the human body? — The stapes, in the middle ear
10. Which is the largest organ of the human body? — The skin
11. Which is the largest gland in the human body, and what does it produce? — The liver — it produces bile, which helps digest fats
12. Where is bile stored in the body? — In the gall bladder
13. Which gland produces insulin, the hormone that controls blood sugar? — The pancreas
14. What is the functional (filtering) unit of the kidney? — The nephron
15. How many chambers does the human heart have? — Four — two atria and two ventricles
16. Which blood cells help the blood to clot? — Platelets
17. How many chromosomes does a normal human cell contain? — 46, in 23 pairs
18. What is a gene? — The basic unit of heredity — a section of DNA that carries the instructions for a trait
19. Deficiency of which vitamin causes night blindness? — Vitamin A
20. Deficiency of which vitamin causes scurvy? — Vitamin C
21. Which vitamin is made in the skin by sunlight, and whose deficiency causes rickets in children? — Vitamin D
22. Deficiency of which vitamin causes beriberi? — Vitamin B1 (thiamine)
23. Deficiency of which mineral causes anaemia? — Iron
24. Deficiency of which element causes goitre (swelling of the thyroid gland)? — Iodine
25. What is the process by which body cells release energy from glucose using oxygen? — Cellular respiration — it produces energy, carbon dioxide and water

Environment, Space and Everyday Technology — Everyday Science MCQs

1. How long does the Earth take to complete one rotation on its axis? — About 24 hours — this gives us day and night
2. How long does the Earth take to complete one revolution around the Sun? — About 365¼ days — this gives us the year
3. What mainly causes the seasons? — The tilt of the Earth's axis (about 23.5°) as it revolves around the Sun
4. Tides in the oceans are mainly caused by what? — The gravitational pull of the Moon (with a smaller effect from the Sun)
5. Which planet is closest to the Sun? — Mercury
6. Which is the largest planet in the solar system? — Jupiter
7. Which is the hottest planet in the solar system, and why? — Venus — its thick carbon dioxide atmosphere traps heat (the greenhouse effect), making it hotter than Mercury
8. Which planet is known as the Red Planet? — Mars
9. Which planet is famous for its prominent rings? — Saturn
10. How long does sunlight take to reach the Earth? — About 8 minutes 20 seconds
11. How long does light from the Moon take to reach the Earth? — About 1.3 seconds
12. In which layer of the atmosphere is the ozone layer found, and what does it protect us from? — The stratosphere — it absorbs harmful ultraviolet radiation from the Sun
13. Acid rain is mainly caused by which gases? — Sulphur dioxide and nitrogen oxides, released by burning fossil fuels
14. Which are the two main greenhouse gases that trap heat in the atmosphere? — Carbon dioxide and methane
15. Earthquakes are recorded by which instrument, and their magnitude measured on which scale? — A seismograph records them; magnitude is measured on the Richter scale
16. Which instrument measures humidity in the air? — Hygrometer
17. Which instrument measures the altitude (height above sea level) of an aircraft? — Altimeter
18. Which part of a computer is called its brain? — The CPU (Central Processing Unit)
19. What is the difference between RAM and ROM in a computer? — RAM is temporary memory that is lost when the power is switched off; ROM is permanent memory that is kept
20. How many bits make one byte? — 8 bits
21. Who is credited with inventing the World Wide Web? — Tim Berners-Lee
22. Radar works by using which kind of waves? — Radio waves
23. Who is credited with inventing the telephone? — Alexander Graham Bell
24. Penicillin, the first widely used antibiotic, was discovered by whom, and in which year? — Alexander Fleming, in 1928
25. A solar cell (photovoltaic cell) converts which form of energy into which? — Solar (light) energy into electrical energy

How Examiners Ask Everyday Science

Everyday Science questions in one-paper tests rarely ask for deep theory. Examiners recycle a small set of patterns, and recognising the pattern is worth as much as knowing the fact:

• Units and instruments: "SI unit of X" and "which instrument measures X" appear in almost every paper. Learn units and instruments together as pairs (force–Newton, pressure–Pascal, barometer–pressure, hygrometer–humidity) so one recall triggers the other.
• "Which" and "why" twists: the same fact is asked from two angles — Venus is asked as "hottest planet" and separately as "why is Venus hotter than Mercury", and mirrors are asked both by use (headlights, rear-view) and by type. Learn the reason, not just the name.
• Deficiency diseases: vitamin and mineral deficiencies are asked as a matching set (A–night blindness, C–scurvy, D–rickets, B1–beriberi, iron–anaemia, iodine–goitre). Revise them as one table in your mind, never as scattered facts.
• Trick pairs: Mercury is closest to the Sun but Venus is hottest; diamond and graphite are both carbon but behave oppositely; RAM is temporary but ROM is permanent. Examiners love pairs where one word changes the answer.
• Everyday applications: fuse wire, fire extinguishers, bleaching powder, solar cells — the question is usually "why is this used here", and the answer is a property (low melting point, does not support combustion, disinfects, converts light to electricity).

Memory and Revision Tips

• Group, don't cram. Revise one branch per sitting — physics today, chemistry tomorrow — and finish with a 10-question self-test from that branch before moving on.
• Make unit-and-instrument flashcards. One side says "measures atmospheric pressure", the other "barometer". Ten minutes a day with these cards beats an hour of re-reading.
• Anchor numbers to stories. 120 days (red blood cells), 206 bones, 46 chromosomes, 746 watts, 8 minutes 20 seconds (sunlight) — attach each number to one vivid image and it stops slipping.
• Attempt with the negative-marking rule in mind. In a PPSC one-paper test, a wrong answer costs 0.25 marks. A question you can narrow to two options is worth attempting; a pure blind guess usually is not.
• Revise the night before from your mistakes only. Keep a notebook of every question you got wrong in this list and in past papers, and read only that notebook on the last evening.

Frequently Asked Questions

How many Everyday Science questions come in a PPSC one-paper test?

It depends on your post's syllabus — Everyday Science sits inside the General Ability portion, and its share varies from post to post. Check the syllabus published for your own post, but expect a solid block of questions from this branch in most general posts, which is why it is worth a full revision round.

Is Everyday Science also asked in FPSC and CSS tests?

Yes. FPSC screening tests include General Knowledge and Everyday Science, and the CSS screening test (MPT) includes General Abilities with science questions. The same 100 facts in this post serve all three — only the depth of the follow-up questions differs.

Do I need to memorise formulas for Everyday Science?

Only the simplest ones: density is mass divided by volume, work is force times distance, and speed is distance divided by time. Most one-paper Everyday Science questions test facts, units and reasons, not calculations.

Are old Everyday Science questions repeated?

The topics repeat far more than the exact wording. Units, instruments, vitamins, planets and gases have been asked for years in slightly different forms — which is exactly why a "most repeated" list like this one is the highest-yield way to revise.

What should I revise after finishing this list?

Past papers of your own post, for the last five years if you can find them, and the science portion of the current-affairs magazines you already read. Mark every new fact you meet into the same mistakes notebook, and your second revision will be shorter and stronger than your first.

More preparation posts — English vocabulary and grammar, Basic Mathematics, Islamic Studies, Computer Basics and current affairs — are published in our Test Preparation section regularly. Bookmark this page and revise it a day before your test.