A) Fusible
B) Not easily reduced by carbon
C) Not easily reduced by hydrogen
D) Strongly basic
Correct Answer: B
Solution :
Alumino thermite process involves reduction of oxides such as \[F{{e}_{2}}{{O}_{3}},\,\,M{{n}_{3}}{{O}_{4}},\,C{{r}_{2}}{{O}_{3}}\] etc. to metals with aluminum. \[C{{r}_{2}}{{O}_{3}}+2Al\to A{{l}_{2}}{{O}_{3}}+2Cr\]\[\Delta H=-\text{ve}\]
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