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Oxides and Oxoanions

An aqueous so...

Question

An aqueous solution of 'X' reacts with sodium chloride to form white precipitate of compound 'Y' which is photosensitive. 'Y' on exposure to sunlight undergoes decomposition reaction to form metal present in compound 'X' and pungent smelling yellowish green colour gas. Identify and write the decomposition reaction.

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Solution

$A n a q u e o u s s o l u t i o n X r e a c t s w i t h s o d i u m c h l o r i d e t o f o r m w h i t e p r e c i p i t a t e o f c o m p o u n d Y w h i c h i s p h o t o s e n s i t i v e . Y o n h e a t i n g g e t s d e c o m p o s e d t o m e t a l a n d g i v e s a p u n g e n t s m e l l i n g y e l l o w i s h g r e e n g a s . A s t h e p u n g e n t s m e l l i n g y e l l o w i s h g r e e n g a s i s c h l o r i n e a n d c o m p o u n d Y i s p h o t o s e n s i t i v e w h i c h i s A g C l . T h u s t h e c o m p o u n d X i s A g N O_{3} a n d o n t r e a t m e n t w i t h N a C l g i v e s w h i t e p r e c i p i t a t e w h i c h i s A g C l A g N O_{3} + N a C l \to A g C l + N a N O_{3} 2 A g C l \overset{∆}{\to} 2 A g + C l_{2}$

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