Question

__________ is used as a catalyst in siliconizing.

(a) Hydrogen peroxide

(b) Chlorine gas

(c) Sulfuric acid

(d) Magnesium sulfate

I had been asked this question by my school teacher while I was bunking the class.

I want to ask this question from Mechanical Tests on Metals, Protection Against Wear topic in chapter Wear of Metals, Mechanical Properties and Testing of Engineering Material & Metallurgy

Answer 1

The correct choice is (b) Chlorine gas

For explanation I would say: In siliconizing, the work is heated in contact with a silicon-bearing material such as silicon carbide. Here, chlorine gas is used as a catalyst. This process is carried out at a temperature of 1700-1850 F.