Inventions and discoveries are one important topic when it comes to SSC & RRB exams. We have compiled a pdf of important inventions in the areas of Physics, Chemistry and Biology. Have a look:
Physics Inventions
| Air Brake | George Westinghouse | 1869 |
| Air conditioner | Willis Carrier | 1902 |
| Air Pressure | Evangelista Torricelli/Gasparo Berti | 1643 |
| Airplane | Wright Brothers | 1903 |
| Ammeter | Friedrich Dexler | 1884 |
| Amplitude Modulation | Reginald Fessenden | mid-1870s |
| Anemometer | Leon Battista Alberti | 1450 |
| Anode Rays | Eugen Goldstein | 1886 |
| Atomic bomb | Robert Oppenheimer | 1945 |
| Atomic Nucleus | Ernest Rutherford | 1911 |
| Automobile | Karl Benz | 1885/1886 |
| Battery | Alessandro Volta | 1800 |
| Calorimeter | Antoine Lavoisier | 1782-83 |
| Camera | Nicéphore Niépce | 1816 |
| Carburetor | Enrico Bernardi | 1882 |
| Cathode Ray Tube | Karl Ferdinand Braun | 1897 |
| Celsius | Anders Celsius | 1742 |
| Cosmic Rays | Victor Hess | 1912 |
| Diesel Engine | Rudolf Diesel | 1890 |
| Dynamite | Alfred Nobel | 1867 |
Chemistry Inventions
| Invention | Inventor | Year |
| Polythene | Eric Fawcett and Reginald Gibson | 1933 |
| Osmosis | Jean Antoine Nollet | 1748 |
| Electrons | J.J. Thomson | 1897 |
| Neutrons | James Chadwick | 1932 |
| Protons | Ernest Rutherford | 1920 |
| Inert Gases | Sir William Ramsay | 1894-1898 |
| Radioactivity | Henri Becquerel | 1896 |
| Periodic Table | Dmitri Mendeleev | 1869 |
| Oxygen | Joseph Priestley | 1774 |
| Hydrogen | Henry Cavendish | 1766 |
| Atoms | John Dalton | 1803 |
| Neon | Georges Claude | Around 1902 |
| Acid | Albert Hofmann | 1938 |
Biology Inventions
| Invention | Inventor | Year |
| 5 kingdom classification | Robert H. Whittaker | 1969 |
| Allopathy | Samuel Hahnemann | 1842 |
| Amoeba | August Johann Rösel von Rosenhof | 1755 |
| Anesthesia | Thomas Green Morton | 1846 |
| Animal electricity | Luigi Galvani | — |
| Anthrax Vaccine | Louis Pasteur | 1881 |
| Aspirin | Felix Hoffman | 1899 |
| Automated DNA Sequencer | Lloyd M. Smith | 1987 |
| Bacteria | Antonie van Leeuwenhoek | 1676 |
| BCG Vaccine | Albert Calmette and Camille Guerin | 1921 |
| Binomial nomenclature | Carolus Linnaeus | 1707 |
| Blood Group | Karl Landsteiner | 1900-1901 |
| Calcium | Sir Humphry Davy | 1808 |
| Cancer | Hippocrates | — |
| Cell | Robert Hooke | 1665 |
| Cell Nucleus | Robert Brown | 1831 |
| Cell Theory | Theodor Schwann and Matthias Jakob Schleiden | 1830 |
| Chloroplast | Konstantin Mereschkowski | 1905 |
| Cholera Vaccine | Waldemar Haffkine | 1892 |
| Chromosomes | Karl Wilhelm von Nägeli | 1842 |
| CT scan | Godfrey Hounsfield & Allan Cormack | 1972 |
| DDT | Paul Hermann Müller | 1939 |
| DNA | Rosalind Franklin and Maurice Wilkins | — |
| DNA Fingerprinting | Dr. Alec Jeffreys | 1984 |
| DNA Structure | James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin | 1962 |
| ECG | Willem Einthoven | 1903 |
| Enzyme | Anselme Payen | 1833 |
| Heart transplantation | Christiaan Barnard, Norman Shumway and Richard Lower | |
| First test tube baby | Robert Edward and Patrick Steptoe | 1978 |
| Genetic code | Marshall Nirenberg and Heinrich J. Matthaei | 1961 |
We hope that this Inventions, Inventors and Years PDF would come handy in your preparation. Wishing you all the best for your preparation!