A salt mixture consists of yellow solid (A) and a colourless solid (B). The aqueous solution of the mixture (i) On passing H_(2)S, we get a black precipitate of (C), which dissolves only in aqua-regia. On extraction and reaction with SnCl_(2) a greyish white precipitate is obtained. (ii) On treatment with ammonium hydroxide a reddish brown precipitate (D) is obtained. The sodium extract of the solution gives the following tests: (i) On reaction with AgNO_(3) it gives a yellow precipitate which is insoluble in NH_(3). (ii) On shaking with FeCl_(3) and C Cl_(4) a violet colouration in C Cl_(4) layer is obtained. Mixture of performing flame test gives lilac colour. Identyfy the compounds (A), (B) , (C) and (D).

A salt mixture consists of yellow solid (A) and a colourless solid (B)

1.	A salt mixture consists of yellow solid (A) and a colourless solid (B). The aqueous solution of the mixture (i) On passing H_(2)S, we get a black precipitate of (C), which dissolves only in aqua-regia. On extraction and reaction with SnCl_(2) a greyish white precipitate is obtained. (ii) On treatment with ammonium hydroxide a reddish brown precipitate (D) is obtained. The sodium extract of the solution gives the following tests: (i) On reaction with AgNO_(3) it gives a yellow precipitate which is insoluble in NH_(3). (ii) On shaking with FeCl_(3) and C Cl_(4) a violet colouration in C Cl_(4) layer is obtained. Mixture of performing flame test gives lilac colour. Identyfy the compounds (A), (B) , (C) and (D).
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