Chemistry SSC GK Questions 1. Chalcopyrite is the most important ore of: Answer: Copper 2. Which of the following metal is found in free form in nature? (a) Silver (b) Gold (c) Copper (d) Tin Answer: Gold 3. Metal is extracted from Sulphide ores by: Answer: Froth floatation 4. Scheelite is the ore of: Answer: Tungsten 5. Which metal has the least resistance? (a) Tungsten (b) Iron (c) Copper (d) Silver Answer: Silver 6. The impurities contained in ore are known as: Answer: Gangue 7. The most abundant gas in the atmosphere of Mars: Answer: Co2 8. Which gas is used for welding? Answer: Acetylene 9. Pitchblende is the ore of: Answer: Uranium 10. The gas used in Cigarette lighters: Answer: Butane 11. The pH value of blood? Answer: 7.4 12. The year of Chernobyl disaster? Answer: 1986 13. The gas emitted by plants during day time: Answer: Oxygen 14. The first to extract kerosene from petroleum? (a) Abrahm Gesner (b) Rudolf Diesel (c) Karl Benz (d) Kekule Answer: Abrahm Gesner 15. What is the colour of Ferrous salt? Answer: Green CHEMISTRY SSC GK 1. The Periodic Table arranges the elements in the order of? Answer: Atomic Number 2. Soap is prepared by boiling Caustic soda with? Answer: Fats 3. Heavy water is? Answer: Deuterium oxide (D2O) 4. Which is called ‘Rock Cotton’? Answer: Asbestos 5. Which is called ‘Black Diamond’? Answer: Coal 6. Which is called ‘Brown Coal’? Answer: Lignite 7. Metals extract from sea water? Answer: Sodium and Magnesium 8. Which is known as ‘Metal of Future’? Answer: Titanium 9. Electron was discovered by? Answer: J.J Thomson 10. ‘Freon’ used as refrigerant is chemically known as? Answer: Fluorinated Hydrocarbon 11. Paper is chemically? Answer: Cellulose 12. Plumbism is a disease caused by? Answer: Lead 13. Ethai ethai is a disease caused by? Answer: Cadmium 14. Minamata is a disease caused by? Answer: Mercury 15. Which gas is evolved when a metal react with acid? Answer: Hydrogen 16. Mercury can best be purified by? Answer: Vacuum Distillation 17. Hardest substance in Earth is? Answer: Diamond 18. Calgon is: Answer: Sodium Hexametaphosphate 19. Carbon content in the steel? Answer: 0.02 to 2.1% 20. The Chemical name of Teflon? Answer: Polytetra Fluoroethylene 21. Impurity present in Ore is: Answer: Gangue 22. The Atomic number was first calculated by? Answer: H.G.J Moseley 23. Simplest Hydrocarbon? Answer: Methane 24. Zinc is extracted by the method? Answer: Electrolysis 25. Who coined the name Oxygen? Answer: Lavoisier 26. The particle having major role in bending the Nucleus? Answer: Meson 27. Substance harms to human due to smoking? Answer: Nicotine 28. The element has Atomic number 2? Answer: Helium 29. The gas helps to ripen fruits? Answer: Ethylene 30. Which metal has the density less than that of water? Answer: Sodium
Posted on: Thu, 24 Oct 2013 04:40:13 +0000
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