Question

Which process does not involve a catalyst?

• A. Haber's process
• B. Thermite process
• C. Ostwald's process
• D. Contact process

Answer 1

The correct option is B 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 B is correct.