General Awareness-General Chemistry-Applied & Basic Chemistry Notes-Part 4

General Awareness - Basic Chemistry - General Chemistry - Applied Chemistry Notes for All Competitive Exams - Part IV

  • Water glass is a mixture of Sodium Silicate. 
  • The gas responsible for the Bhopal Gas Tragedy was Methyl Isocyanates. 
  • Phenol is used as an antiseptic. 
  • Bleaching powder is made from lime and chlorine. 
  • Graphite in nuclear reactors is used as moderator for neutrons. 
  • The element common to all acids is hydrogen. 
  • Calcium silicate is the main constituent of glass. 
  • The conversion of a substance directly from solid to vapor state is known as sublimation e.g. Camphor Iodine etc. 
  • Sodium benzoate is used for preservation purposes. 
  • Oxygen is was discovered by Priestley 
  • Heavy water, Graphite and Neutrons are used as Moderator in nuclear reactors. 
  • A mixture of water and Sodium chloride can be separated distillation. 
  • The particle that is used to trigger off the nuclear fission reaction is neutron. 
  • Excessive chlorination leads to pollution of water by producing HCL. 
  • Wax is rich in hydrocarbons. 
  • The most common type of radioactive disintegration involves β-particles. 
  • Acetylene and oxygen find application in gas welding. 
  • Anthracite is the purest form of mineral coal. 
  • CO2 is used in fire extinguishers.
  • RDX and Nitroglycerine are explosives. 
  • Hydrogen is used in billing balloons
  • Soap is prepared by boiling caustic soda with fats. 
  • The first known super conductor is Mercury. 
  • In a nuclear reactor uncontrolled fission reaction takes place. 
  • In the process of electroplating of an object with nickel the nickel is made anode while the object is made cathode. 
  • Radioactivity is due to unstable and heavy nucleus. 
  • Low combustion temperature and high calorific value are the feature of a good fuel. 
  • Atomic weight = Equivalent weight x valency. 
  • When an element burns in air. It is converted into a compound. 
  • The element present in the largest amount in rock and minerals is silicon. 
  • An element common in nichrome and German Silver is Nickel.
  • Chloral when heated with cone H2S04 gives D.D.T. 
  • The setting of Plaster of Paris is due to hydration. 
  • Green vitriol is ferric sulphate (FeS047H2O). While blue vitriol is (CuS045H2O).
  • Corborundum is used as an abrasive for cutting and grinding glasses. 
  • Maximum 'Gobar Gas' is produced during the rainy season. 
  • The boiling point of a liquid increases with boiling point of a liquid increases with increases of pressure. 
  • Combustion of candle is an example of exothermic reaction. 
  • Y-rays are used for sterilizing food stuffs controlling pests and cancer therapy. 
  • To check the flow of blood ferric chloride is used. 
  • Cryolite is a double - floride of Aluminium and Sodium. 
  • The Chemical name of the Lunar Caustic is Silver Nitrate (AgNO3)
  • The total number of electrons in Ammonium Ion (NH4 +) is 10
  • A fusion reaction is initiated by high temperature. 
  • Evaporation takes place at all temperatures from the surface and is accompanied by cooling. 
  • The gas used in refrigerators is Amonia.
  • Zinc phosphate and zinc phosphate are used as rat poisons. 
  • Aluminium phosphate is used as pesticide. 
  • Bronze is an alloy of Cu and Sn. While Brass is that of Cu and Zn. 
  • Electro Static Precipitators (ESP) can help to reduce the menace of fly-ash. 
  • L.P.G. consists mainly of propane and butane. 
  • Geiger - Muller counter is a device for detecting radioactive materials. 
  • Chemically the bulk of biogas consists methane (CH4)
  • In a fission reaction, a heavy atomic nucleus splits up with the emission of neutrons.
  • The domestic cooking gas consists mostly of liquefied butane and isobutene. 
  • Natural gas predominately is methane. 
  • Gelatin is used in the manufacture of ice-cream prevent crystal growth. 
  • In Dead Sea, the boiling point of water will be maximum. 
  • The metals, which can be drawn into wires is called ducts. 
  • The mass of the proton is 1800 times that of an electron. 
  • Soaps are produced by the Saponification of fats with alkali solution. 
  • The lightest substance known is Hydrogen and the heaviest is Osmium. 
  • Alcoholic beverages contain ethyl alcohol. 
  • The corrosion of Iron can be prevented by galvanizing and coating it with grease. 
  • Hydrogenated Vegetable Oil (HVO) finds application in the preparation of bread, biscuits and vegetable ghee. 
  • Methyl alcohol causes blindness. When present in liquor. 
  • Magnesium is commonly extracted from seawater commercially. 
  • Nitrous Oxide (N20) is used as an anesthetic.
  • The most common element by weight in Earth's crust is oxygen. 
  • When a solid metals, thermal energy is absorbed. 
  • Chromatography is the Science to Separate. 
  • Diamond is harder than graphite due to the difference in its crystalline structure. 
  • Plutonium is not found in nature.
  • The substance whose aqueous solution will be better conductor of electricity than water is the common salt. 
  • Mercury 'is also known as Quick Silver. 
  • Enriched Uranium means natural uranium which has been coated with -235. 
  • At Kelvin zero the motion of the molecules ceases. 
  • At its melting point ice is lighter than water because Ice crystals have follow hexagonal arrangement of H20 molecule.
  • Vinegar is an aqueous solution of acetic acid. 
  • A discharge of electricity through neon at low temperature produces an intense orange-red glow. 
  • When iron rusts its weights increases. 
  • Nuclear fusion is also known as ThermoNuclear reaction because in demands conditions of extremely high temperatures.
  • Brownian Movement is observed in vessel containing gas and dust particles. 
  • H202 is stored in coloured bottles in order to prevent self-oxidation and reduction. 
  • In a Cathode Ray Tube (CRT) the cathode rays emanate from cathode and travel forwards. 
  • All bicarbonates are soluble in water. 
  • Sulphuric acid is used as a dehydrating agent. 
  • Nichrome wire is used as a heating element in many appliances because it can be drawn into wires easily and it resists oxidation in air when red hot. 
  • Glycerin, in fact is an alcohol. 
  • In a common fluorescent tube mercury and organ are used
  • The resinous substance, shellac is obtained from the distillation of wood. 
  • The element showing maximum tendency towards catenation is carbon. 
  • Among the fertilizers, urea has the maximum nitrogen content. 
  • Wood heated in an enclosed container will produce char coal. 
  • If the pH-values of an acid is lower it means it is stronger. 
  • The Chemical commonly used for preserving biological specimens is formaldehyde. 
  • The process of loss of electrons in a chemical reaction is called oxidation. 
  • A thermostat is a device used to maintain a constant temperature of a water bath or an oven. 
  • Sulphuric acid is often called the king of chemicals. 
  • Filter beds used to remove suspended impurities from municipal water consists of fine S and char coal and gravel. 
  • The evaporation of a liquid is accompanied by decrease in entropy. 
  • Isotopes are generally separated by distillation. 
  • When some salt is sprinkled on slab of ice, it does not melt readily. 
  • Catalyst in a chemical reaction generally helps to accelerate a reaction. 
  • D.D.T and Gammexane are insecticides. 
  • Cadmium rod is used in a reactor to absorb neutrons. 
  • German Silver is an alloy of Zn, Cu and Ni
  • Alcohol mixed with water can be separated by the process of distillation. 
  • In a dry cell zinc and carbon act as electrodes. 
  • The process of apply in zinc is called galvanization. 
  • The oil in water is an example of suspension. 
  • Sun's energy is due to Nuclear Fusion in which Hydrogen is converted into Helium. 
  • The force of attraction - between like molecules is called cohesion 
  • Permanent hardness of water is due to the sulphates of Ca and Mg. 
  • Air is neither an element nor a compound but a mixture. 
  • A large amount of energy is released during nuclear fission because of a loss of Mass. 
  • Plaster of Paris (CaS04H2O) is basically gypsum ( CaS04  1/2 H20 ).
  • Aqua regia is cone nitric acid and cone hydrochloric acid. 
  • Among the constituents of air, the largest in proportion is Nitrogen. 
  • Malathion is an insecticide. 
  • Lead is added to Petrol as an octane booster. 
  • The cosmic rays entering our atmosphere are almost entirely positively charged particles. 
  • Heating element in an electric heater is made of nichrome. 
  • A variety of glass used for optical purpose contains lead silicate. 
  • Vinyl plastics are used as adhesive. 
  • Heavy water (D20) is used in a reactor to slow down neutrons.
  • Chlorofluorocarbons (CFCs) are chemical compounds that find application in refrigeration and air conditioning.
  • Rubber is a polymer of isoprene while Nylon is a polyamide. 
  • Two metals combine to form an alloy. 
  • The Freezing point of water decreases, when some soluble is dissolved in it. 
  • Boiling point of water increases with increase in pressure. 
  • The moderator in a nuclear reactor slows down the neutron to increase the probability of fission. 
  • Sodium is stored in Kerosene in order to avoid its evaporation. 
  • A tomb bomb is an example of nuclear fission reaction. While Hydrogen bomb is that of nuclear fusion reaction. 
  • Wrought Iron is purest type of Iron that contains least amount of carbon.
  • In the Halogen family Iodine exists as solid and Bromine as liquid. 
  • The explosion of an atom bomb is caused by the un controlled fission reaction of U-23S. 
  • Salt solution in water is a good conductor of electricity. 
  • The best conductor of electricity is distilled water. 
  • γ-rays are electromagnetic radiations. 
  • Otto Hahn invented nuclear fission as well as atom bomb. 
  • In a fast breeder reactor. U-238 gets converted into plutonium-239. 
  • In a refrigerator cooling is produced by the evaporation of a volatile liquid. 
  • The charge carried by a proton is equal but opposite to that of an electron. 
  • Fire caused by petrol can be extinguished by foam. While due to electricity by carbon, tetrachloride (CCI4)
  • Ethyl Alcohol (C2H5OH) is manufactured industrially by fermentation of cane sugar.
  • Calcination is a process in which the ore is heated in absence of air. 
  • Change of liquid to gaseous sate is called vaporization. 
  • Diamond is the hardest natural occurring substance because of covalent bonds between its atoms. 
  • Lead provides a good protective shield against radioactivity. 
  • Detergents are made of sulphates. 
  • CO2 alone contributes to global warming
  • Click For Part 1 | Part II | Part III
Posted by - Blog Author: 7:24 PM Last Updated at: 7:24 PM

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