A white powder when strongly heated gives off brown fumes. $A$ solution of this white powder gives a yellow precipitate with a solution of $K I$ . When a solution of barium chloride is added this white powdered solution, a white precipitate forms. This white powder may be:

A Soluble Sulphate

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K B r

and

N a B r

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B a {(N O}_{3})_{2}

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A g {N O}_{3}

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Solution

The correct option is D $A g {N O}_{3}$
The given white powder is $A g N O_{3}$ and when it is strongly heated, brown fumes comes out.
$2 A g N O_{3} Δ - \to 2 A g + 2 N O_{2} ↑ + O_{2} ↑$
(Brown)
The solution gives a yellow precipitate with a solution of $K I$ .
$A g N O_{3} (a q) + K I (a q) \to A g I ↓ + K N O_{3} (a q)$
(Yellow ppt)
When a solution of barium chloride is added, a white precipitate forms.
$2 A g N O 3 (a q) + B a C l_{2} (a q) \to 2 A g C l ↓ + B a (N O_{3})_{2}$
(White ppt)
$A g C l$ is also soluble in $N H_{3} (a q)$ .
$A g C l + 2 N H_{3} \to A g (N H_{3})_{2} C l$ (Soluble complex).

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A white powder when strongly heated gives off brown fumes. A solution of this white powder gives a yellow precipitate with a solution of KI. When a solution of barium chloride is added this white powdered solution, a white precipitate forms. This white powder may be:

A white powder when strongly heated gives off brown fumes. $A$ solution of this white powder gives a yellow precipitate with a solution of $K I$ . When a solution of barium chloride is added this white powdered solution, a white precipitate forms. This white powder may be: