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JEE Advanced Chemistry Amines 2022 JEE Advanced 2022 (Paper 1)

JEE Advanced Chemistry Question (2022) — Solution

Question

Match the compounds in LIST- I with the observations in LIST- II , and choose the correct option.   LIST- I   LIST- II I Aniline P Sodium fusion extract of the compound on boiling with  FeSO 4 , followed by acidification with conc.  H 2 SO 4 , gives Prussian blue color. II o - Cresol Q Sodium fusion extract of the compound on treatment with sodium nitroprusside gives blood red color. III Cysteine R Addition of the compound to a saturated solution of NaHCO 3 results in effervescence. IV Caprolactam S The compound reacts with bromine water to give a white precipitate.     T Treating the compound with neutral FeCl 3 solution produces violet color.  

Options

  1. A. I → P , Q ; II → S ; III → Q , R ; IV → P
  2. B. I → P ; II → R , S ; III → R ; IV → Q , S
  3. C. I → Q , S ; II → P , T ; III → P ; IV → S
  4. D. I → P , S ; II → T ; III → Q , R ; IV → P

Answer

D. I → P , S ; II → T ; III → Q , R ; IV → P

Step-by-step solution

I Since it contains both carbon and nitrogen so its sodium fusion extract with boiling  FeSO 4 , followed by acidification with conc.  H 2 SO 4  gives Prussian blue colour. Fe 2 + + 6 CN - → Fe CN 6 4 - 3 Fe CN 6 - 4 + 4 Fe 3 + → xH 2 O Fe 4 Fe CN 6 3 . xH 2 O                                                                                                                       Prussian   blue I - P , S II    o - Cresol  Violet coloured complex III  Cysteine Since it has both, sulphur and nitrogen, so its sodium fusion extract will give blood red colour with  Fe 3 +  and it has carboxylic group so it will give effervescence with  NaHCO 3 . IV  Caprolactam Its sodium fusion extract will give Prussian blue colour on boiling with  FeSO 4  followed by acidification with conc.  H 2 SO 4 .

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