फ्रेडरिच अ. केकुले 1865 में एक – McqOptions

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1.	फ्रेडरिच अ. केकुले 1865 में एक सपने में क्या अणु के सममित संरचना की खोज की थी?
A.	ओजोन
B.	बेंजीन
C.	पानी
D.	अमोनिया
Answer» C. पानी

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