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Joseph Priestley in 1774, performed an experiment in which Red mercuric oxide HgO was heated by focusing Sun’s rays on it using a convex lens.
Positively charged ions (cations) get attracted to the cathode and gain electrons from it to form neutral atom.
The chemical reaction either caused or accompanied by the passage of an electric current are called electrochemical reactions.
Galvanizing is a process in which iron or steel is coated with thin layer of zinc to protect them from corrosion.
A desiccator is an air tight glass vessel with a suitable drying agent, anhydrous calcium chloride placed at the bottom of the vessel.
Water shows an unusual or anomalous behaviour when it is heated or cooled between 0°C and 4°C. All substances generally contract on cooling while
Methane (from Natural gas) is mixed with steam, compressed at 30 atm pressure and passed over a nickel about 800oC to form water gas.
The process through which a solid directly changes to a gaseous state without passing through a liquid state is known as sublimation.
Conc. H2SO4 acts as dehydrating agent when acetic acid reacts with ethyl alcohol and this process is called esterification.
Some salts while crystallising out from their aqueous solution, unite with a definite quantity of water which is known as water of