Top 50 General Science and Technology GK Question Answers

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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