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Scientific Facts - 5

1.     Silicon and Germanium are commonly used materials to make - Transistors.
2.     Saponification involves the hydrolysis of fats and oils by - Caustic acid
3.     Reaction of alcohol, with carboxylic acid is known as – Esterification
4.     Radium is obtained from - Pitchblende.
5.     PVC is obtained by the polymerisation of - Vinyl Chloride
6.     Probability of getting head in a throw of a coin - ½
7.     Potassium nitrate is used in - Fertilizer Industry.
8.     Polythene is industrially prepared by the polymerization of – Ethylene
9.     Pollution of water bodies by which element causes Minamata disease – Mercury
10.  Photosynthesis is - An endothermic process
11.  Persons sitting in an artificial satellite of the earth have - Zero weight
12.  Permanent hardness of water can be removed by adding - Washing Soda
13.  Peat coal is the type of coal having - The Highest Amount of Plant Material.
14.  Oxygen along with the acetylene gas is used in the - Welding Industry.
15.  Nowadays, to reduce air pollution, the buses in Delhi are running on - Compressed Natural Gas

16.  Nitrogen Oxide is also known as - Laughing Gas.
17.  The disease " bronchitis " is associated with – Lungs
18.  The device used for detecting even feeble current – Galvanoscope
19.  The chemical used as a fixer in photography is - Sodium Thiosulphate

20.  The charcoal used to de-colourise  raw sugar is - Wood Charcoal


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