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a
2–(4–nitrophenyl)–1–phenyl ethan–2–one
b
1–(4–nitrophenyl)–2–phenyl ethan–1–one
c
2–(4–nitrophenyl)–1–phenyl ethan–1–one
d
1–(4–nitrophenyl)–2–phenyl ethan–2–one
answer is C.
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Detailed Solution
[Step 1]: 1–nitro–4–(phenylethynyl)benzene on hydration will give the keto product 2–(4–nitrophenyl)–1–phenyl ethan–1–one based on the stability of the carbanion.