During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in NH4OH solution when sodium carbonate extract was first acidified with dil.

Question

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in NH4OH solution when sodium carbonate extract was first acidified with dil. HNO3 and then AgNO3 solution was added. This indicates presence of:

(A) Br–
(B) 3 CO
(C) I–
(D) Cl–

Prashant Kotian · Accepted Answer

Correct answer: A. Ag+ + I–  AgI Yellow ppt. Ag+ + Cl–  AgCl White ppt Ag+ + Br–  AgBr Pale yellow ppt

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