1.

Q. When H_(2)S gas was passed into filtrate (P), a coloured precipitate was obtained, then cation present in the filtrate is:

Answer»

`Zn^(2+)(AQ.)`
`CR^(3+)(aq.)`
`Al^(3+)(aq.)`
`PB^(2+)(aq.)`

SOLUTION :`PbS` (Black ppt).


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