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

CuSO4 + Mg → MgSO4 + Cu

उपरोक्त अभिक्रिया में Mg ___________है। 

1
ऑक्सीकारण कर्मक
2
विलायक कर्मक
3
अपचायक कर्मक
4
उत्प्रेरक 
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