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steam distillation
fractional crystallisation
fractional distillation
sublimation
In a barometer, mercury is preferred over water because
In a chemically pure state, diamonds are
In a diesel engine the high temperature needed to ignite the fuel is achieved by-
In a filament type light bulb most of the electric power consumed seems as
In a medium heat flows by the actual movement of the particles of the medium. This process of heat transmission is known as
In a period from Li to F, ionisation potential
In a photocell light energy is converted into
In a railway track, two rails are joined end to end with a gap in between themas
In absorption of insolation, the most significant part is played by
In an electric kettle water becomes hot by
