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General Principles and processes of Isolation of Elements
medium
ગોલ્ડસ્મીટ એલ્યુમિનો થર્મિક પ્રક્રમમાં નીચેના પૈકી કયો રિડક્શનકર્તા વપરાય છે ?
A
કેલ્શિયમ
B
કોક
C
$Al-$ પાઉડર
D
સોડિયમ
(JEE MAIN-2013)
Solution
Reduction by powdered aluminium is known as Gold-Schmidt aluminothermic process. This process is employed in cases where metals have very high $m.p.$ and are to be extracted from their oxides.
Standard 12
Chemistry