1.

A white sublimable solid, when boiled with a NaOH solution, give a colour less gas thal turns Nessler's Teagent brown. The solid on being heated with solid K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4), gives red brown vapours. The white solid can be

Answer»

`NH_(4)Cl`
`NH_(4)Br`
`NH_(4)I`
`(NH_(4))_(2)SO_(4)`

Solution :`NH_(4)Cl, NH_(4)Br` gives `NH_(3)` GAS with NAOH turns. Nesslers reagent brown.
`K_(2)Cr_(2)O_(7)+H_(2)SO_(4)` with `Cl^(-)` gives `CrO_(2)Cl_(2)` and with `Br^(-)` gives `Br_(2)` both are red


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