Science Question Answer in English : This post provides a collection of the most important questions from Physics, Chemistry, and Biology, along with quiz practice and mock tests to strengthen your preparation. All questions are based on exam patterns and frequently asked topics.
If you are preparing for competitive exams like SSC, UPSC, Railways, Banking, or State-level exams, then Science GK Questions and Answers are extremely important for scoring high marks.
Science Question Answer in English
Science GK Questions Answers : Science is one of the most scoring and concept-based sections in almost every competitive exam. A strong understanding of basic concepts can help you answer questions quickly and accurately.
- Frequently asked in SSC, UPSC, Railway, Banking exams
- Improves basic concepts and understanding
- Enhances general awareness
- Helps in quizzes, mock tests, and daily practice
100 Science Question Answer (Science GK)
Q. 1 What is the escape velocity from the Earth’s surface? – 11.2 km/s
Q. 2 Which mirror is used in the headlights of cars? – Concave mirror.
Q. 3 What is the unit of Astronomical Distance? – Light year.
Q. 4 Who discovered the Law of Gravity? – Isaac Newton.
Q. 5 Which instrument is used to measure the purity of milk? – Lactometer.
Q. 6 What is the unit of Radioactivity? – Curie / Becquerel.
Q. 7 What is the primary cause of the ‘Twinkling of Stars’? – Atmospheric Refraction.
Q. 8 Who invented the Barometer? – Evangelista Torricelli.
Q. 9 Which wave is used in Sonar to find submerged objects? – Ultrasonic waves.
Q. 10 What is the working principle of an Optical Fiber? – Total Internal Reflection.
Q. 11 Short-sightedness (Myopia) can be corrected using which lens? – Concave lens.
Q. 12 Which instrument measures the depth of the ocean? – Fathometer.
Q. 13 What color has the longest wavelength in the visible spectrum? – Red.
Q. 14 What is the value of ‘g’ at the center of the Earth? – Zero.
Q. 15 Which law explains the working of a Rocket? – Newton’s Third Law of Motion.
Q. 16 Which material is used in the control rods of a nuclear reactor? – Cadmium or Boron.
Q. 17 What is the boiling point of water in Fahrenheit? – 212°F.
Q. 18 Which instrument measures very high temperatures? – Pyrometer.
Q. 19 Who discovered X-rays? – Wilhelm Roentgen.
Q. 20 Resistance is measured in which unit? – Ohm.
Q. 21 The sound of an explosion on the Moon cannot be heard on Earth because? – There is no medium (vacuum).
Q. 22 Which primary colors make up the white light? – Red, Green, and Blue.
Q. 23 What is the unit of Luminous Intensity? – Candela.
Q. 24 Why do we see lightning before hearing thunder? – Light travels faster than sound.
Q 25 What is the density of water maximum at? – 4°C.
Science Question Answer (Chemistry)
Q. 26 Which gas is known as the ‘Stranger Gas’? – Xenon.
Q. 27 What is the chemical name of Vinegar? – Acetic Acid.
Q. 28 Which metal is known as ‘Quick Silver’? – Mercury.
Q. 29 What is the main component of Natural Gas? – Methane (CH_4).
Q. 30 Which isotope of Carbon is used in Carbon Dating? – C-14.
Q. 31 What is the hardest form of Carbon? – Diamond.
Q.32 Which gas is used for the artificial ripening of fruits? – Acetylene / Ethylene.
Q. 33 What is the chemical formula of Plaster of Paris? – CaSO_4 \cdot \frac{1}{2}H_2O.
Q. 34 Which acid is used in Car Batteries? – Sulphuric Acid (H_2SO_4).
Q. 35 What is the ‘King of Chemicals’? – Sulphuric Acid.
Q. 36 Which gas was leaked during the Bhopal Gas Tragedy? – Methyl Isocyanate.
Q. 37 Which non-metal is a good conductor of electricity? – Graphite.
Q. 38 What is the chemical name of Vitamin B12? – Cyanocobalamin.
Q. 39 Which metal is stored in Kerosene? – Sodium (Na).
Q. 40 What is the purity of 24-carat gold? – 100%.
Q. 41 Which gas is used in electric bulbs to prevent oxidation? – Argon / Nitrogen.
Q. 42 What is the chemical name of Bleaching Powder? – Calcium Hypochlorite.
Q. 43 Which fuel has the highest calorific value? – Hydrogen.
Q. 44 Which element is present in all organic compounds? – Carbon.
Q. 45 What is ‘Heavy Water’? – Deuterium Oxide (D_2O).
Q. 46 What is the most abundant element in the Earth’s crust? – Oxygen.
Q.47 What is the most abundant metal in the Earth’s crust? – Aluminium.
Q. 48 Which acid is found in Lemon and Orange? – Citric Acid.
Q. 49 What is the main constituent of Hemoglobin? – Iron (Fe).
Q. 50 Which metal is found in Chlorophyll? – Magnesium (Mg).
Science Question Answer – Biology
Q. 51 Which blood group is known as the ‘Universal Donor’? – O Negative.
Q. 52 Which blood group is the ‘Universal Receptor’? – AB Positive.
Q. 53 What is the structural and functional unit of life? – Cell.
Q. 54 Which organ is called the ‘Graveyard of RBCs’? – Spleen.
Q. 55 What is the normal blood pressure of a human? – 120/80\text{ mmHg}.
Q. 56 Which hormone is known as the ‘Emergency Hormone’? – Adrenaline.
Q. 57 Which vitamin helps in blood clotting? – Vitamin K.
Q. 58 What is the largest bone in the human body? – Femur (Thigh bone).
Q. 59 What is the smallest bone in the human body? – Stapes (In the ear).
Q. 60 Which part of the eye is donated during a transplant? – Cornea.
Q. 61 What is the study of fungi called? – Mycology.
Q. 62 What is the study of algae called? – Phycology.
Q. 63 Which protein is found in human hair and nails? – Keratin.
Q. 64 What is the average lifespan of an RBC? – 120 days.
Q. 65 Which disease is caused by the deficiency of Vitamin A? – Night Blindness.
Q. 66 What is the function of Ribosomes? – Protein Synthesis.
Q. 67 Which test is used to diagnose AIDS? – ELISA Test.
Q. 68 Which organ secretes Insulin? – Pancreas.
Q. 69 What is the total number of chromosomes in a human cell? – 46 (23 pairs).
Q. 70 Which vitamin is water-soluble? – Vitamin B and C.
Q. 71 Which acid is produced in the human stomach? – Hydrochloric Acid (HCl).
Q. 72 What is the largest gland in the human body? – Liver.
Q. 73 Which animal is called the ‘Farmer’s Friend’? – Earthworm.
Q. 74 What is the scientific name of Human? – Homo sapiens.
Science & Technology Question Answer
Q. 75 What is the percentage of water in human blood plasma? – 90%.
Q. 76 Mixed Science & TechnologyWho is the ‘Father of Biology’? – Aristotle.
Q. 77 Which planet has the most moons? – Saturn.
Q. 78 What is the full form of DNA? – Deoxyribonucleic Acid.
Q. 79 Who discovered the Circulation of Blood? – William Harvey.
Q. 80 What is the pH value of human blood? – 7.4.
Q. 81 Which gas causes the ‘Greenhouse Effect’? – Carbon Dioxide, Methane, Water vapor.
Q. 82 Which metal is used to galvanize iron? – Zinc.
Q. 83 Who discovered the Electron? – J.J. Thomson.
Q. 84 Who discovered the Proton? – Ernest Rutherford.
Q. 85 Who discovered the Neutron? – James Chadwick.
Q. 86 What is the chemical name of Vitamin D? – Calciferol.
Q. 87 Which instrument is used to record Earthquake waves? – Seismograph.
Q.88 What is the unit of work and energy? – Joule.
Q. 89 Which metal is the best conductor of electricity? – Silver (Ag).
Q.90 What is the process of conversion of solid into gas directly? – Sublimation.
Q. 91 Which gas is used in Soda Water? – Carbon Dioxide.
Q.92 Which vitamin is destroyed on heating? – Vitamin C.
Q. 93 Who is known as the ‘Father of Vaccination’? – Edward Jenner.
Q.94 Which gas is used to fill balloons that fly? – Helium.
Q. 95 What is the main component of LPG? – Butane.
Q. 96 Which pigment gives color to human skin? – Melanin.
Q. 97 Which part of the brain controls memory and intelligence? – Cerebrum.
Q. 98 What is the study of birds called? – Ornithology.
Q. 99 Which acid is found in an apple? – Malic Acid.
Q.100 The ‘Theory of Evolution’ was given by? – Charles Darwin.
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