General Science is an Important section in any competitive exam and in Railways exams it plays a crucial role. It is not difficult to learn basic general Science if we plan wisely. Cracku brings to you daily General Science Twenty-20 updates covering one subject, starting from 20-03-2018. Learn and try to remember only so much that is provided in our capsule every day and we are sure, you will master General Science Section before the exam.
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Chemistry 20 Important One Liners
| Metal which is also known as “Quick Silver” |
Mercury |
| French Chemist who is considered as the “Father of Modern Chemistry” | Antoine Lavoisier |
| A fine dispersion of minute droplets of one liquid into another in which it is not soluble or miscible | Emulsion |
| The SI Unit of Radioactivity | Becquerel |
| Swedish Chemist known for the invention of Dynamite | Alfred Nobel |
| Chemical name of Laughing Gas | Dinitrogen Monoxide |
| The main ore of Lead metal | Galena |
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| Most abundant Metal in the earth’s crust | Aluminum |
| Most abundant element in the earth’s crust | Oxygen |
| Acid that decomposes at Ordinary Room Temperature | Nitric Acid |
| The first Scientist to use symbols for elements in a very specific sense | John Dalton |
| Sub atomic particles of an Atom | Protons, Electrons and Neutrons |
| Effect on Melting Point of Ice with increase in pressure | Decreases |
| The elastic tendency of a fluid surface which makes it acquire the least surface area possible | Surface Tension |
| Effect on the surface tension of the liquid with increase in Temperature | Decreases |
| Chemical Name of Vinegar | Acetic Acid |
| Two or more compound that are composed of the same kind and number of atoms but differ from each other in structural arrangement | Isomers |
| pH value of Human Blood | 7.4 |
| Most commonly used chemical in Voting Ink | Silver Nitrate |
| Element with the lowest boiling point | Helium |
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