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Crystallisation

25. TA mixtur...

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25. TA mixture contains 4-methylaniline, 2-naphthol, 3-chlorobenzoic acid and 1,3-dinitrobenzene. The following scheme of separation is used to separate its constituents. The correct statement(s) regarding the separation method is/are: (A) The reagents in Step 2 and Step 3 can be interchanged (i.e. aq. NaOH in Step 2 and aq. NaHCO3 in Step 3). (B) Y is 3-chlorobenzoic acid. (C) W and Z are 4-methylaniline and 1,3-dinitrobenzene respectively. (D) If the original mixture also contains 4-aminobenzoic acid, it will be present in the filtrate of Step 1.

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