defence exam Agniveer Army Tradesman Mock Test Series 2025 General Science Chemistry Chemical Reaction

अपचयोपचय (रेडॉक्स) अभिक्रियाओं में _________होता है।

1
ऑक्सीकरण 
2
अपचयन
3
उदासीनीकरण
4
(1) व (2) दोनों
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