Question

Which of the following is not true for thermit reaction?

• A. It is a displacement reaction
• B. It is highly exothermic reaction
• C. The reaction involved is:
  $A{l}_2{O}_3\left(s\right)+Fe\left(s\right)\to Al\left(l\right)+F{e}_2{O}_3\left(s\right)+Heat$
• D. The reaction is used to join railway track

Answer 1

The correct option is C The reaction involved is:

$A{l}_2{O}_3\left(s\right)+Fe\left(s\right)\to Al\left(l\right)+F{e}_2{O}_3\left(s\right)+Heat$
The thermite reaction is:
$F{e}_2{O}_3\left(s\right)+2Al\left(s\right)\to 2Fe\left(l\right)+A{l}_2{O}_3\left(s\right)+Heat$
This displacement reaction is highly exothermic.