A) Krolls process
B) van Arkel process
C) Ellingham process
D) Goldschmidts aluminothermite process
Correct Answer: D
Solution :
In Goldschmidts alumino thermite process, is used when a high temperature is needed for carbon to reduce an oxide. In this process a large amount of energy \[(1675\,\,kJ\,mo{{l}^{-1}})\] is liberated on oxidation to \[A{{l}_{2}}{{O}_{3}}\]. \[3Mn{{O}_{3}}+8Al\xrightarrow{{}}9Mn+4A{{l}_{2}}{{O}_{3}}\] \[{{B}_{2}}{{O}_{3}}+2Al\xrightarrow{{}}2B+A{{l}_{2}}{{O}_{3}}\] \[C{{r}_{2}}{{O}_{3}}+2Al\xrightarrow{{}}2Cr+A{{l}_{2}}{{O}_{3}}\]
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