Which of the following process is uded to prevent formation of iron oxide by applying a protective zinc coating to iron?

32) Which of the following is the heat treatment process in which iron or steel absorbs carbon liberated when the metal is heated in the process of a carbon bearing material, in order to make the metal harder?

Answer is:

Explanation:

precisely enough for reduction but no oxidation occurs

precisely enough for equal amounts of oxidation and reduction occurs

precisely enough for oxidation but no reduction occurs

precisely enough for burning, and neither oxidation nor reduction occurs

Answer is:

Explanation:

Answer is:

Explanation:

Answer is:

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