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Choose the correct tests with respective observations. (A) CuSO4 (acidified with acetic acid) + K4[F — JEE Mains Chemistry Past Papers Chemistry Question

Question

Choose the correct tests with respective observations. (A) CuSO4 (acidified with acetic acid) + K4[Fe(CN)6] Chocolate brown precipitate. (B) FeCl3 + K4[Fe(CN)6] Prussian blue precipitate. (C) ZnCl2 + K4[Fe(CN)6], neutralised with NH4OH White or bluish white precipitate. (D) MgCl2 + K4[Fe(CN)6] Blue precipitate. (E) BaCl2 + K4[Fe(CN)6], neutralised with NaOH White precipitate. Choose the correct answer from the options given below : (A) C, D and E only (B) B, D and E only (C) A, D and E only (D) A, B and C only

Answer: D

💡 Solution & Explanation

(A) CuSO4 (acidified with acetic acid) + K4[Fe(CN)6]  Cu2[Fe(CN)6] (Chocolate brown precipitate). (B) FeCl3 + K4[Fe(CN)6]  Fe4[Fe(CN)6]3 (Prussian blue precipitate). (C) ZnCl2 + K4[Fe(CN)6], neutralised with NH4OH  K2Zn3[Fe(CN)6]2 (White or bluish white precipitate)

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