Question

In a thermite process ………….. is used as reducing agent.

• A. Zn
• B. Al
• C. Mn
• D. F

Answer 1

Answer: (B)

Al

Answer 2

A mixture of oxide ore and aluminium powder is commonly called thermite. Oxides of Cr, Mn, Fe, etc. are reduced by Al.

$\mathrm { Cr } _ { 2 } \mathrm { O } _ { 3 } + 2 \mathrm { Al } \rightarrow 2 \mathrm { Cr } + \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$

$3 \mathrm { Mn } _ { 3 } \mathrm { O } _ { 4 } + 8 \mathrm { Al } \rightarrow 2 \mathrm { Cr } + \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$

$\mathrm { Fe } _ { 2 } \mathrm { O } _ { 3 } + 2 \mathrm { Al } + \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } + \mathrm { Fe }$