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Thursday, June 6, 2019
किसी रासायनिक अभिक्रिया में ऑक्सीजन के अनुपात का बढ़ना क्या कहलाता है ?
(A) अपचयन अभिक्रिया
(B) उपचयन अभिक्रिया
(C) विस्थापन अभिक्रिया
(D) उष्माशोषी अभिक्रिया
Ans (B)
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