Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Chemical Reaction
Tarnishing of ornaments is an example of __________.
1
oxidation reaction
2
neutralisation reaction
3
exothermic reaction
4
More than one of the above
5
None of the above