General Knowledge

Common Facts

Common Facts

Sl. No. Catalyst Process
1 Fe + Mo Synthesis of NH3 by Haber's process
2 Ni Synthesis of vanaspati Ghee (hydrogenation)
3 Pt Synthesis of H2SO4 by Contact process
4 NO In the manufacture of H2SO4 by the Lead chamber process
5 Hot A12O3 In the preparation of Ether from Alcohol
6 CuCl2 Preparation of chlorine gas by Deacon process

Some Important Explosive

» Dynamite : It was discovered Alfred Nobel in 1863. It is prepared by absorption of raw dust with Nitro-glycerine. In modern dynamite Sodium Nitrate is used in place of Nitro-glycerine.
» Tri Nitro Toluene (TNT)
» Tri Nitro Benzene (TNB)
» Tri Nitro Phenol (TNP) : It is also known as picric acid.
» R.D.X is highly explosive known as plastisizer in which Aluminium powder is mixed to increase the temperature and the speed of fire.

Some Important Facts

» Age of fossils and archaeological excavation is determined by radioactive carbon (C14).
» Diamond has maximum refractive index and due to total internal reflection. It has lustre.
» Chloroform in sunlight forms poisonous gas 'Phosgene' (COCl2).
» To decrease the basicity of soil gypsum is used.
» In the preparation of Talcom powder theo phestal mineral is used.
» Potassium chloride is most suitable for the removal of permanent hardness of water.
» To avoid melting of ice gelatine is used.
» When dry ice is heated it is directly converted into gas.
» Saccharine is prepared from toluene.
» Cream is a type of milk in which amount of fat is increased while amount of water decrease.
» From one kilogram of honeybee 3500 calorie energy is produces.
» N2O is known as laughing gas.
» Bones contain about 58% calcium phosphate.
» Phosphine gas is used in voyage as Holmes signal.
» Chlorine gas bleaches the colour of flower.
» Red phosphorus is used in match industry.
» Urea contains 46% nitrogen.
» In the electroplating of vessel NH4C1 is used.
» Power alcohol is prepared from mixing pure alcohol in benzene which is used as rocket fuel.
» Artificial perfumes are prepared from Ethyl acetate.
» Urea was the first organic compound synthesised in Laboratory.
» Vinegar contains 10%; acetic acid.
» Acetylene is used for light production.
» Ferric chloride is used to stop bleeding.
» Barium is responsible for green colour in fireworks.
» Cesium is used in solar cells.
» Yellow phosphorus is kept in water.
» Sea weeds contains iodine.
» During cooking maximum vitamin is lost.
» For the preparation of silver mirror, glucose is used.
» When cream is separated from milk, it's density increases.
» For artificial respiration mixture of oxygen and helium gas cylinder is used.
» In cold places, to decrease the freezing point ethylene glycol is used.
» Hydrogen peroxide is vised for oil paintings.
» Sodium is kept in kerosene oil.
» The heaviest element is Osmium (Os).
» The lightest element, least dense and most reductant is lithium (Li).
» Flourine is the most oxidising agent.
» Silver is the best conductor of electricity.
» Radon is the heaviest gas.
» Polonium has the maximum number of isotopes.
» Sulphuric acid is known as oil of vitriol.
» Noble metals — Ag, Au, Pt, Ir, Hg, Pd, Rh, Ru, and Os.