Static GK
Static GK
Static GK is the permanent part of General Knowledge useful for all competitive exams. It includes fixed facts like capitals, currencies, national parks, rivers, dams, important days, awards, books, and historical events. It helps in securing quick marks in exams like SSC, Railways, and Banking.
1. Which gas is known as ‘Laughing Gas’?
A. CO₂ B. N₂O C. NO D. NH₃
Ans: B. N₂O
Explanation: Nitrous oxide (N₂O) is called laughing gas, used as an anesthetic.
2. The hardest substance in the human body is:
A. Bone B. Tooth enamel C. Calcium D. Keratin
Ans: B. Tooth enamel
Explanation: Tooth enamel is made of hydroxyapatite and is the hardest biological substance.
3. Which gas is filled in electric bulbs ?
A. Helium B. Oxygen C. Nitrogen D. Hydrogen
Ans: C. Nitrogen
Explanation: Nitrogen prevents oxidation of filament inside bulbs.
4. Who discovered radioactivity ?
A. Roentgen B. Becquerel C. Einstein D. Rutherford
Ans: B. Becquerel
Explanation: Henri Becquerel discovered radioactivity in 1896.
5. The pH value of human blood is:
A. 5.0 B. 6.5 C. 7.4 D. 8.0
Ans: C. 7.4
Explanation: Human blood is slightly alkaline.
6. SI unit of energy is:
A. Joule B. Newton C. Watt D. Pascal
Ans: A. Joule
Explanation: 1 Joule = 1 Newton × 1 metre.
7. The process by which plants prepare food is called:
A. Digestion B. Respiration C. Photosynthesis D. Excretion
Ans: C. Photosynthesis
Explanation: Plants use sunlight to convert CO₂ and water into glucose.
8. What percentage of Earth’s surface is covered by water ?
A. 50% B. 61% C. 71% D. 81%
Ans: C. 71%
Explanation: About 3/4th of Earth’s surface is water.
9. Which gas is released during respiration ?
A. Nitrogen B. Oxygen C. Carbon dioxide D. Hydrogen
Ans: C. Carbon dioxide
Explanation: Humans exhale CO₂ after respiration.
10. Which vitamin is produced in the body with sunlight ?
A. Vitamin A B. Vitamin B C. Vitamin C D. Vitamin D
Ans: D. Vitamin D
Explanation: Sunlight helps skin produce Vitamin D.
11. The unit of electric current is:
A. Volt B. Ohm C. Ampere D. Joule
Ans: C. Ampere
Explanation: Named after André-Marie Ampère, it measures flow of electric charge.
12. Who discovered the structure of DNA?
A. Watson and Crick B. Rutherford C. Dalton D. Einstein
Ans: A. Watson and Crick
Explanation:They proposed the double helix model in 1953.
13. Chemical formula of water is:
A. H₂O B. HO₂ C. O₂H D. H₂O₂
Ans: A. H₂O
Explanation: Each water molecule contains two hydrogen and one oxygen atom.
14. Who discovered the law of gravitation ?
A. Newton B. Galileo C. Einstein D. Pasteur
Ans: A. Newton
Explanation: Isaac Newton discovered the law of universal gravitation.
15. Largest gland in the human body is:
A. Thyroid B. Liver C. Pancreas D. Heart
Ans: B. Liver
Explanation: The liver helps in detoxification and digestion.
16. Red blood cells (RBCs) are formed in:
A. Heart B. Bone marrow C. Lungs D. Liver
Ans: B. Bone marrow
Explanation: Bone marrow produces RBCs, WBCs, and platelets.
17. The most abundant gas in air is:
A. Oxygen B. Carbon dioxide C. Nitrogen D. Hydrogen
Ans: C. Nitrogen
Explanation: Nitrogen makes up about 78% of Earth’s atmosphere.
18. Sound travels fastest in:
A. Solid B. Liquid C. Gas D. Vacuum
Ans: A. Solid
Explanation: Sound needs a medium; it travels faster in solids because particles are closely packed.
19. Who discovered electricity ?
A. Thomas Edison B. Benjamin Franklin C. Michael Faraday D. James Maxwell
Ans: B. Benjamin Franklin
Explanation: He proved lightning is a form of electricity.
20. How many bones are there in the human body?
A. 200 B. 206 C. 208 D. 210
Ans: B. 206
Explanation: An adult human has 206 bones.
21. Which element is called “King of Metals”?
A. Gold B. Platinum C. Iron D. Copper
Ans: A. Gold
Explanation: Gold is highly valuable and resistant to corrosion.
22. Smallest bone in human body is:
A. Femur B. Stapes C. Radius D. Carpal
Ans: B. Stapes
Explanation: Located in the middle ear, it helps in hearing.
23. Vitamin C is chemically known as:
A. Citric acid B. Ascorbic acid C. Folic acid D. Acetic acid
Ans: B. Ascorbic acid
Explanation: Essential for immunity and skin health.
24. A bulb rated 220V, 100W draws current:
A. 0.45 A B. 0.5 A C. 2.2 A D. 0.1 A
Ans: B. 0.5 A
Explanation: Current = Power / Voltage = 100 / 220 ≈ 0.45 A.
25. Heart attack is caused due to:
A. Lack of glucose B. Blockage in arteries C. High blood pressure D. Weak lungs
Ans: B. Blockage in arteries
Explanation: Blockage in coronary arteries stops blood flow to the heart.
26. Which metal conducts electricity best?
A. Gold B. Aluminium C. Silver D. Copper
Ans: C. Silver
Explanation: Silver has the highest electrical conductivity.
27. Metal present in chlorophyll is:
A. Iron B. Magnesium C. Copper D. Zinc
Ans: B. Magnesium
Explanation: It helps capture sunlight during photosynthesis.
28. Powerhouse of the cell is:
A. Ribosome B. Mitochondria C. Nucleus D. Cytoplasm
Ans: B. Mitochondria
Explanation: It produces energy in the form of ATP.
29. Difference between mass and weight:
A. Both are same B. Mass constant, weight changes C. Weight constant, mass changes D. Both change
Ans: B. Mass constant, weight changes
Explanation: Weight depends on gravity; mass doesn’t.
30. Which planet is known as “Red Planet”?
A. Venus B. Mars C. Saturn D. Jupiter
Ans: B. Mars
Explanation: Due to iron oxide (rust) on its surface.
31. Which instrument measures air pressure?
A. Thermometer B. Barometer C. Hydrometer D. Gas meter
Ans: B. Barometer
Explanation: Invented by Torricelli.
32. Which metal is liquid at room temperature ?
A. Zinc B. Gallium C. Mercury D. Lead
Ans: C. Mercury
Explanation: Only metal that remains liquid at room temperature.
33. Which part of the plant performs respiration ?
A. Root B. Stem C. Leaf D. All of these
Ans: D. All of these
Explanation: All living parts of plants respire.
34. Radiation can travel through:
A. Solids B. Liquids C. Vacuum also D. Only gases
Ans: C. Vacuum also
Explanation: Unlike conduction or convection, radiation doesn’t need a medium.
35. Function of red blood cells (RBC):
A. Protection B. Carry oxygen C. Digestion D. Temperature control
Ans: B. Carry oxygen
Explanation: RBCs contain haemoglobin to carry oxygen.
36. Soap forms foam in water because:
A. Surface tension decreases B. Temperature increases C. Chemical reaction D. Pressure
Ans: A. Surface tension decreases
Explanation: Soap lowers surface tension, forming bubbles.
37. The smallest particle of an atom is:
A. Electron B. Neutron C. Proton D. Nucleus
Ans: A. Electron
Explanation: It carries a negative charge.
38. Which hormone controls sleep?
A. Melatonin B. Insulin C. Thyroxine D. Adrenaline
Ans: A. Melatonin
Explanation: Secreted by the pineal gland, regulates sleep cycle.
39. One watt equals:
A. 1 joule/second B. 1 newton/meter C. 1 joule/meter D. 1 ampere/second
Ans: A. 1 joule/second
Explanation: Watt is the rate of doing work.
40. Filament of electric bulb is made of:
A. Iron B. Tungsten C. Copper D. Nickel
Ans: B. Tungsten
Explanation: High melting point metal used in bulbs.
41. RADAR works on the principle of:
A. Sound waves B. Reflection C. Refraction D. Polarization
Ans: B. Reflection
Explanation: Radar uses reflected radio waves to detect objects.
42. Ozone layer is made of which gas?
A. Oxygen B. Nitrogen C. Carbon D. Hydrogen
Ans: A. Oxygen
Explanation: Ozone (O₃) is a triatomic form of oxygen.
43. Function of bile in the body:
A. Fat digestion B. Protein digestion C. Carbohydrate digestion D. Glucose formation
Ans: A. Fat digestion
Explanation: Bile emulsifies fats into smaller droplets.
44. Negative charge in atom is carried by:
A. Proton B. Electron C. Neutron D. Nucleus
Ans: B. Electron
Explanation: Electrons revolve around the nucleus.
45. Sugar present in milk is:
A. Sucrose B. Lactose C. Glucose D. Fructose
Ans: B. Lactose
Explanation: Lactose is a natural milk sugar.
46. Number of pairs of ribs in humans:
A. 10 B. 12 C. 14 D. 16
Ans: B. 12
Explanation: Humans have 12 pairs = 24 ribs.
47. SI unit of temperature:
A. Fahrenheit B. Kelvin C. Celsius D. Joule
Ans: B. Kelvin
Explanation: Kelvin is the SI unit used in science.
48. Main gas causing air pollution:
A. CO₂ B. SO₂ C. N₂ D. H₂
Ans: B. SO₂
Explanation: Sulphur dioxide causes acid rain.
49. Which rays help in formation of Vitamin D?
A. X-rays B. Gamma rays C. Ultraviolet rays D. Infrared rays
Ans: C. Ultraviolet rays
Explanation: UV rays help skin make Vitamin D.
50. Element used in nuclear power plants:
A. Uranium B. Lead C. Mercury D. Tin
Ans: A. Uranium
Explanation: Uranium-235 is used as nuclear fuel.