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

ଲୁହା ରେ କଳଙ୍କି ଲାଗିବା ପ୍ରକ୍ରିୟାକୁ _____ କୁହାଯାଏ?

1

ବିଜାରଣ

2

ଗାଲଭାନାଇଜେସନ୍

3

ଅବଶୋଷଣ

4

ସଂକ୍ଷାରଣ

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