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Tin
Silicon
Thallium
Caesium
The max. fixation of solar energy is done by
The melting point of copper is
The members of a homologous series have
The mercury sodium street lamps light up as of:
The metal extracted from Bauxite is
The metallic constituents of hard water are:
The method of age determination called radioactive uranium dating cannot be used to determine the age of
The method used to obtain alcohol from molasses is called
The minimum temperature is measure by -
The mirror used in search light is -