1.

The aqueous solutio of a inorganic compound (X) yielded a white precipitated when treated with dil HNO_(3) and AgNO_(3) . Another sample of solution of (X) when treated with NaOH gas a white precipitate first which dissolved in excess of NaOH yielding a colorless solution. Whne H_(2)S gas was passed through that ssolution and white precipitate was obtained. Identify the compound (X) and give the reactions.

Answer»

Solution :`UNDERSET((X))(ZnCl_(2))+2AgNO_(3)underset("WHITE")(2AgCl DARR)+Zn(NO_(3))_(2)`
`ZnCl_(2)+2NaOH rarr underset("White")(Zn(OH)_(2)darr)+2NaCl`
`Zn(OH)_(2)+2NaOHrarr underset("Colourless "sol^(n))(Na_(2)ZnO_(2))+2H_(2)O`
`Na_(2)ZnO_(2)+H_(2)S underset("White")(ZnS darr) +2NaOH`


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