किसी अभिक्रिया में पदार्थ का उपचयन कब होता है? Kisi Abhikriya Mein Padarth Ka Upchayan Kab Hota Hai?
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किसी अभिक्रिया में पदार्थ का उपचयन कब होता है? Kisi Abhikriya Mein Padarth Ka Upchayan Kab Hota Hai?

किसी अभिक्रिया में पदार्थ का उपचयन कब होता है? Kisi Abhikriya Mein Padarth Ka Upchayan Kab Hota Hai?
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किसी अभिक्रिया में पदार्थ का उपचयन कब होता है? Or, Kisi Abhikriya Mein Padarth Ka Upchayan Kab Hota Hai?
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किसी अभिक्रिया में पदार्थ का उपचयन (Oxidation) तब होता है जब उसमें ऑक्सीजन की वृद्धि या हाइड्रोजन की कमी (ह्रास) होती है।

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