Please explain in detail

Q       Y e l l o w   p p t   T K 2 C r O 4 / H +   X   d i l .   H C l   Y   Y e l l o w   p p t   +   Z   p u n g e n t   s m e l l i n g   g a s                     I f   X   g i v e s   g r e e n   f l a m e   t e s t .   T h e n ,   X   i s   ( A )     M g S O 4                   ( B )   B a S 2 O 3                     ( C )     C u S O 4               (   D )     P b S 2 O 3  

Dear Student,

The answer is Option (B) BaS2O3 which on reacting with HCl gives yellow precipitate an insoluble compound with liberation H2S an pungent smelling gas, while in other hand on reacting with potassium dichromate results in formation of insoluble mass of yellow precipitate.

Regards.

  • 1
BaS2O3.
because only  Ba gives green flame colour
  • -1
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