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Top 50 General Science and Technology GK Question Answers

By Vikash Suyal | Science | May 21, 2018

General Science and Technology Questions for Competitive Exam




  1. Tamiflue is a frontline drug against: --- Bird flu

  2. Who invented optical fibre ? ---Narinder Kapany (Germany)

  3. The concept of ‘survival of the fittest’ was first propounded by : --- Darwin

  4. Hydrogen spectrum was first explained by :--- Niels Bohr

  5. ‘Shortsightedness’ (myopia) in human eye was corrected by using proper: --- Concave lens

  6. Impure camphor is purified by : --- Sublimation

  7. Aluminium is purified by :--- Electrolysis

  8. The body is protected against drying, absorbing and bacterial invasion by the : ---Epithelium

  9. The artificial kidney operates on the principle of : --- Dialysis

  10. Encephalitis occurs when : --- The meanings of the brain become inflamed

  11. Artificial rain is produced by seeding the clouds with : ---Silver lodide

  12. The Speed of Neutrons in a nuclear reactor is suppressed by :        ---Heavy Water Graphite  Beryllium Oxide

  13. Astigmatism is a defect of vision which can be rectified by using : ---Sphero-cylindrical lenses

  14. Bleeding of gums is caused by the deficiency of : ---Vitamin  C

  15. A fountain –pen functions on the  principle of :    ---Surface Tension(Capillary action )

  16. Which vitamin is essential for the coagulation of blood? ---Vitamin K

  17. The power of a lens is -2D .What is its focal length ?      ---0.5 m

  18. The number of maximum different electrical combinations possible with three equal resistances: ---Four

  19. The primary component of natural gas is : ---Methane

  20. Who won the Noble Prize for his work on Photoelectric effect ? ---Albert Einstein

  21. Law of heredity was put forward by : ---Mendel

  22. A device used for converting A.C. into D.C. is called : ---Rectifier

  23. Which vitamin can be synthesized in Liver : ---Vitamin K

  24. Which is widly used in plastic industry for manufacturing Bakelite ?       --- Phenol

  25. In a reachargeable cell what kind of energy is stored with in the cell ? ---Chemical Energy

  26. The carbon dating method is used for determining the age of :      ---Fossils

  27. The hottest planet in the solar system is : ---Venus

  28. Ripe grapes contain : ---Glucose

  29. Polythene is the polymer of : ---Aniline

  30. Rayon is made from : ---Cellulose

  31. The mass of a body is different from its weight because:---Mass is a measure of the quantity of matter in the body while weight is the force with which body is attracted by the earth

  32. A horse pulling a cart moves forward due to force exerted by : --- the ground on the horse’s feet

  33. In a barometer liquid is preffered over water because : --- Mercury has high density and low vapour pressure

  34. Soap bubbles show multiple colours when viewed in white light because :--- The interference of the reflected light from the two surfaces of the soap film

  35. Who got Nobel Prize in 1983 on his outstanding discovery of ‘jumping genes’ ? ---Barbara McClinton

  36. What does taxonomy deal with ? ---It deal with inditification nomenclature and classificationof all living organism

  37. Lichen is considered to be a symbiotic association of two living orgarnisms are involoved

  38. in it ? ---Algae and fungi

  39. Who coined the term ‘gene’ for the factors controlling heredity ? ---W.Johannsen

  40. Carborundum is  a compound of :    ---Si

  41. A positron is an elementary particle having : ---Mass equal to that of an electron and charge equal and opposite to that of an electron

  42. Hydrogen bomb is based on the principle of :  ---Uncontrolled fusion reaction

  43. A metal brick, thrown into deep take, sink sdeeper and .How does the buoyant force acting on it change ? ---It does not change but remains constant

  44. How does an astronaut on a space walk change his direction ? ---By using a rocket

  45. The term ‘RAM’ STANDS FOR : ---Random Access Memory

  46. Which scientist was responsible for binomial nomenclature ? ---Linnaeus

  47. From which part of the plantsis turmeric,a commonly-used colourant and antiseptic , obtained ? ---From stem

  48. The colour of cow’s milk is slightly yellowish due to the presence of : ---Riboflavin

  49. Reserpine is used to :      ---Reduce high blood pressure

  50. Xerophthalmia is caused by the dietary deficiency of : ---Vitamin A



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