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{:(FeCl(3)+'X'("salt solution")rarr,'Y'(...

`{:(FeCl_(3)+'X'("salt solution")rarr,'Y'("dark violet colouration")),(," "darr"on standing"),(,["Colour disappears"]):}`
Here 'X' and 'Y' are:

A

`Na_(2)S_(2)O_(3)` and `FeS_(4)O_(6)`

B

`Na_(2)S_(2)O_(3)` and `[Fe(S_(2)O_(3))_(2)]^(-)`

C

`Na_(2)SO_(3)` and `FeSO_(4)`

D

`Na_(2)S` and `(FeS +S)`

Text Solution

Verified by Experts

The correct Answer is:
B
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