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Redox Reactions

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Question

A solution of white crystals gives a yellow precipitate with $A g N O_{3}$ but no precipitate with a solution of $N a_{2} C O_{3}$ . The action of $c o n c . H_{2} S O_{4}$ on the crystals yields a brown gas. The crystals are of :

A

N a N O_{3}

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B

K C l

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C

C a {(O N_{3})}_{2}

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D

N a B r

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Solution

The correct option is D $N a B r$
Reaction:
$A g N O_{3} + N a B r \to A g B r$ yellow ppt.

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