Question

Which of the following processes does not involve a catalyst?

• A. Thermite process
• B. Ostwald's process$(HN{O}_3$)
• C. Contact process
• D. Haber's process

Answer 1

The correct option is A Thermite process

The catalyst is a substance, which lowers the activation energy of reaction because it provides an alternate pathway for reaction. Generally, catalyst increases the speed of a reaction.

The reaction involved in the thermite process is as follows:

$4Al+2C{r}_2{O}_3\to 2A{l}_2{O}_3+4Cr$ is itself a very fast reaction.

Apart from this, all processes are catalyzed.

Hence, option (A) is correct.