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During which year, Joseph Priestley discovered O2?(a) 1774(b) 1770(c) 1884(d) 1880This question was addressed to me in quiz.I would like to ask this question from Photosynthesis Basics topic in portion Photosynthesis in Higher Plants of Biology – Class 11

Answer»

Right OPTION is (a) 1774

To elaborate: Joseph Priestley discovered O2 in 1774. He found the PRESENCE of oxygen during his experiment. In a jar containing a mouse, a candle and a mint PLANT, he found out that the mouse was alive and the candle was lit up. This SHOWED that the mint plant gave oxygen to the enclosed jar.



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