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JEE Main levelSingle correct optionDifficulty 2 of 3si052

Nitrobenzene is warmed with dust and solution, filtered, and the filtrate is treated with Tollens reagent. A grey-black precipitate of silver forms because of

  1. Aazobenzene
  2. BN-phenylhydroxylamine
  3. Caniline
  4. Dbenzene

Answer: B

In neutral medium reduces a nitro group only to the hydroxylamine stage, . This is a good reducing agent and reduces Tollens reagent to silver (Mulliken-Barker test). Aniline does not reduce Tollens reagent.
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