railway RRB Group D Mock Test Series 2024-25 General Science Chemistry Chemical Reaction

लोखंड गंजण्याच्या प्रक्रियेस _____ म्हणतात.

1
क्षपण 
2
गॅल्व्हानीकरण 
3
अभिशोषण
4
संक्षारण 
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