General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question
Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements1 Mark
MCQ
Alumina thermite process involves reduction of chromium $(II)$ oxide with $.........$
A
Copper
B
Zinc
C
Iron
✓
Aluminium
✓
Answer
Correct option: D.
Aluminium
Aluminium is used in thermite process as it has high boiling point, low cost and more reactivity than many of the $d-$block metals. Oxidizers used are boron$(\text{III})$ oxide, chromium$(\text{III})$ oxide, iron$(\text{II, III})$ oxide and copper$(II)$ oxide.
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