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General science Daily MCQ Practice for BPSC, UPSC, SSC

Introduction

Preparing for competitive exams like BPSC, UPSC, and SSC requires a strong grasp of science and technology concepts. Regular MCQ practice enhances conceptual clarity, improves problem-solving skills, and boosts time management. Solving daily science and technology MCQs helps candidates revise key topics, understand exam patterns, and retain important facts effectively.

Here, we present 30 multiple-choice questions on science and technology, including some from previous years’ question papers. These questions will help aspirants refine their preparation strategy and stay ahead in their exams.

General science MCQ for BPSC, UPSC, SSC

Physics MCQs

1. Which of the following laws explains the working of a rocket?
   a) Newton’s First Law
   b) Newton’s Second Law
   c) Newton’s Third Law
   d) Law of Conservation of Mass
2. The speed of light is maximum in which medium?
   a) Water
   b) Glass
   c) Air
   d) Vacuum
3. What is the SI unit of electrical resistance?
   a) Volt
   b) Ohm
   c) Ampere
   d) Watt
4. Which of the following has the highest refractive index?
   a) Air
   b) Water
   c) Diamond
   d) Glass
5. The working principle of a transformer is based on:
   a) Ohm’s Law
   b) Faraday’s Law of Electromagnetic Induction
   c) Newton’s Laws of Motion
   d) Joule’s Law of Heating
6. X-rays were discovered by:
   a) Albert Einstein
   b) Wilhelm Roentgen
   c) J.J. Thomson
   d) Marie Curie
7. What type of mirror is used in vehicle rearview mirrors?
   a) Convex Mirror
   b) Concave Mirror
   c) Plane Mirror
   d) Cylindrical Mirror
8. Which one of the following is a scalar quantity?
   a) Velocity
   b) Acceleration
   c) Force
   d) Energy
9. Which principle explains the lift of an airplane?
   a) Pascal’s Principle
   b) Bernoulli’s Principle
   c) Archimedes’ Principle
   d) Newton’s Law
10. The term “Mach number” is related to:
    a) Speed of an aircraft
    b) Density of a fluid
    c) Electrical resistance
    d) Atomic structure

Chemistry MCQs

11. Which gas is commonly used in fire extinguishers?
    a) Oxygen
    b) Carbon dioxide
    c) Nitrogen
    d) Hydrogen
12. The pH value of pure water at 25°C is:
    a) 5
    b) 7
    c) 9
    d) 10
13. Which metal is most reactive?
    a) Gold
    b) Silver
    c) Potassium
    d) Iron
14. Which of the following is a noble gas?
    a) Oxygen
    b) Hydrogen
    c) Helium
    d) Nitrogen
15. The hardest naturally occurring substance is:
    a) Graphite
    b) Quartz
    c) Diamond
    d) Iron
16. Which acid is present in lemon?
    a) Acetic acid
    b) Citric acid
    c) Sulfuric acid
    d) Hydrochloric acid
17. The chemical formula of baking soda is:
    a) NaCl
    b) NaHCO₃
    c) CaCO₃
    d) KOH
18. What is the main component of LPG (Liquefied Petroleum Gas)?
    a) Methane
    b) Ethane
    c) Propane and Butane
    d) Hydrogen
19. The ozone layer protects Earth from:
    a) X-rays
    b) Gamma rays
    c) Ultraviolet rays
    d) Infrared rays
20. Stainless steel is an alloy of iron and:
    a) Carbon
    b) Chromium and Nickel
    c) Copper
    d) Zinc

Biology MCQs

21. Which part of the human body produces insulin?
    a) Liver
    b) Pancreas
    c) Kidney
    d) Stomach
22. Which vitamin is known as the “sunshine vitamin”?
    a) Vitamin A
    b) Vitamin B
    c) Vitamin C
    d) Vitamin D
23. The study of fungi is called:
    a) Botany
    b) Zoology
    c) Mycology
    d) Ecology
24. The smallest bone in the human body is found in the:
    a) Leg
    b) Ear
    c) Hand
    d) Nose
25. DNA is mainly found in the:
    a) Ribosomes
    b) Nucleus
    c) Mitochondria
    d) Golgi body
26. Which disease is caused by a deficiency of iodine?
    a) Rickets
    b) Scurvy
    c) Goiter
    d) Anemia
27. Which organ in the human body purifies blood?
    a) Heart
    b) Kidney
    c) Liver
    d) Lungs
28. Malaria is caused by:
    a) Virus
    b) Bacteria
    c) Protozoa
    d) Fungi
29. Which of the following is an example of a waterborne disease?
    a) Tuberculosis
    b) Cholera
    c) Measles
    d) Hepatitis B
30. The unit of the human nervous system is:
    a) Nephron
    b) Neuron
    c) Axon
    d) Dendrite

Daily MCQ practice in science and technology is essential for aspirants preparing for BPSC, UPSC, and SSC. It strengthens conceptual understanding, improves accuracy, and enhances exam performance. Regularly solving previous year questions and new practice sets will boost confidence and help in achieving success in competitive exams.

For more daily MCQ practice sets, stay tuned! Keep practicing and keep learning!

Here are the answers to the General science Daily MCQ Practice set:

Physics MCQs

1. c) Newton’s Third Law
2. d) Vacuum
3. b) Ohm
4. c) Diamond
5. b) Faraday’s Law of Electromagnetic Induction
6. b) Wilhelm Roentgen
7. a) Convex Mirror
8. d) Energy
9. b) Bernoulli’s Principle
10. a) Speed of an aircraft

Chemistry MCQs

11. b) Carbon dioxide
12. b) 7
13. c) Potassium
14. c) Helium
15. c) Diamond
16. b) Citric acid
17. b) NaHCO₃
18. c) Propane and Butane
19. c) Ultraviolet rays
20. b) Chromium and Nickel

Biology MCQs

21. b) Pancreas
22. d) Vitamin D
23. c) Mycology
24. b) Ear
25. b) Nucleus
26. c) Goiter
27. b) Kidney
28. c) Protozoa
29. b) Cholera
30. b) Neuron

Here are the explanations for each answer:

Physics MCQs

1. Newton’s Third Law: A rocket works based on Newton’s Third Law—“For every action, there is an equal and opposite reaction.” The rocket expels gases downward, creating an upward thrust.
2. Vacuum: The speed of light is fastest in a vacuum (3 × 10⁸ m/s) because there are no particles to slow it down. It slows down in air, glass, or water due to refraction.
3. Ohm: The SI unit of electrical resistance is the Ohm (Ω), named after Georg Simon Ohm.
4. Diamond: Diamond has the highest refractive index (~2.42), making it sparkle as it bends and reflects light significantly.
5. Faraday’s Law of Electromagnetic Induction: A transformer works on Faraday’s Law, which states that a changing magnetic field induces an electric current.
6. Wilhelm Roentgen: He discovered X-rays in 1895, which revolutionized medical imaging.
7. Convex Mirror: Rearview mirrors use convex mirrors because they provide a wider field of view and always form an upright image.
8. Energy: Unlike force, velocity, and acceleration (which have direction), energy is a scalar quantity, meaning it only has magnitude.
9. Bernoulli’s Principle: This principle explains how airplane wings generate lift—the air moves faster over the wing, creating lower pressure on top and lifting the plane.
10. Speed of an aircraft: Mach number is the ratio of an object’s speed to the speed of sound in air. Mach 1 means the object is moving at the speed of sound (~343 m/s in air).

Chemistry MCQs

11. Carbon dioxide (CO₂): Fire extinguishers use CO₂ because it displaces oxygen, preventing combustion.
12. 7: Pure water at 25°C has a neutral pH of 7. Acidic solutions have pH < 7, and basic solutions have pH > 7.
13. Potassium: The reactivity of metals follows the reactivity series. Potassium (K) is one of the most reactive metals, reacting violently with water.
14. Helium: Helium is a noble gas and is chemically inert, meaning it does not react easily.
15. Diamond: The hardest naturally occurring substance is diamond due to its strong carbon-carbon covalent bonds in a tetrahedral structure.
16. Citric acid: Lemon contains citric acid, which gives it its sour taste.
17. NaHCO₃: The chemical formula of baking soda is sodium bicarbonate (NaHCO₃), which is used in cooking and as an antacid.
18. Propane and Butane: LPG (Liquefied Petroleum Gas) is mainly a mixture of propane (C₃H₈) and butane (C₄H₁₀), used as a cooking and heating fuel.
19. Ultraviolet rays: The ozone layer absorbs harmful UV rays from the sun, protecting life on Earth.
20. Chromium and Nickel: Stainless steel is an alloy of iron, chromium, and nickel, making it resistant to rust and corrosion.

Biology MCQs

21. Pancreas: The pancreas produces insulin, a hormone that regulates blood sugar levels.
22. Vitamin D: Also called the sunshine vitamin, Vitamin D is synthesized in the skin when exposed to sunlight.
23. Mycology: The study of fungi, including mushrooms and molds, is called Mycology.
24. Ear: The smallest bone in the human body is the stapes (stirrup bone) in the middle ear.
25. Nucleus: DNA (Deoxyribonucleic acid), which carries genetic information, is found in the nucleus of a cell.
26. Goiter: Iodine deficiency leads to goiter, causing the thyroid gland to swell.
27. Kidney: The kidneys filter waste from blood and produce urine to remove toxins.
28. Protozoa: Malaria is caused by the Plasmodium parasite, a protozoan, transmitted by Anopheles mosquitoes.
29. Cholera: Caused by Vibrio cholerae bacteria, cholera spreads through contaminated water and food.
30. Neuron: The nervous system is made up of neurons, which transmit signals between the brain and body.