GK Questions - Important Inventions

• 21. Who invented Electron ?

  Thomson. J of Britain in 1897

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• 22. Who invented Floppy disk ?

  IBM in 1970

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• 23. Who invented Neutron ?

  JAMES CHADWICK in 1932

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• 24. Who invented Refrigerator ?

  Oliver Evans in 1805

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• 25. Who invented Safety Pin ?

  Walter Hunt of U.S.A. in 1849

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• 26. Who invented Safety razor ?

  King Camp Gillette of U.S.A. in 1903

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• 27. Who invented Stainless Steel ?

  Harry Brearley of Britain in 1913.

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• 28. Who invented Steam Engine ?

  Thomas Savery of Britain in 1698

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• 29. Who invented Steam Engine (Piston)

  Thomas Newcomen of Britain in 1712

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• 30. Who invented Steam Engine (Condenser)

  James Watt of Britain in 1765

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• 31. Who invented watch ?

  Peter Henlein invented the first portable time piece in 1504

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• 32. Who invented Transformer ?

  Ottó Bláthy

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• 33. Who invented X-ray ?

  W.K. Roentgen of Germany in 1895.

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• 34. Who invented Aspirin ?

  Felix Hoffmann invented Aspirin

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• 35. Who invented Chemotherapy ?

  Paracelsus of Switzerland

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• 36. Who invented Bacteria ?

  Leeuwenhock of Netherlands in 1683

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• 37. Who invented Biochemistry ?

  Jan Baptista Van Helmont of Belgium in 1648.

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• 38. Who invented Blood Transfusion ?

  Jean-Baptiste Denys of France in 1625.

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• 39. Who invented Morphine ?

  Friderich Sertumer of Germany in 1805

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• 40. Who invented Bakelite ?

  Leo H. Baekeland of Belgium in 1907.

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