Question

In the chemical vapour deposition the films formed are formed by decomposition of what kind of substances?

(a) Liquid molecules

(b) Conducting polymers

(c) Gaseous molecules

(d) Solid molecules

The question was posed to me by my college professor while I was bunking the class.

My doubt is from Preparation of Thin Films in chapter Preparative Methods of Solid State Chemistry

Answer 1

The correct answer is (c) Gaseous molecules

To explain: Chemical vapour deposition the films are formed by deposition of gaseous molecules, the decomposition can be achieved by for example, pyrolysis (i.e. heating), photolysis (i.e. irradiation with IR or UV light) or chemical reaction.