Verified Solution • 2025–26 Session
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QJEEM21Chaae8: JEE Main 2021 Chemistry - Class 11 JEEM21Chaae8 Solution: An inorganic Compound 'X' on treatment with concentrated H 2 SO …
An inorganic Compound 'X' on treatment with concentrated H2SO4 produces brown fumes and gives dark brown ring with FeSO4 in presence of concentrated H2SO4. Also Compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated with H2S gas. The precipitate 'Y' on treatment with concentrated HNO3 followed by excess of NH4OH further gives deep blue coloured solution, Compound 'X' is :
Multiple Choice Options
- A Co(NO3)2
- B Pb(NO2)2
- C Cu(NO3)2
- D Pb(NO3)2
Step-by-Step Verified Solution
Compound ‘X’ is copper nitrate, i.e. Cu(NO3)2 is an inorganic compound. On treatment with concentrated H2SO4 produces brown fumes and gives dark brown ring with FeSO4 in presence of concentrated H2SO4. Chemical reaction is as follows
Cu2+ is a group II cation with group II reagents (HCl/H2S) , it gives black coloured precipitates. These precipitates gives blue colour solution on treatment with HNO3 followed by excess of NH4OH.
Cu2+ is a group II cation with group II reagents (HCl/H2S) , it gives black coloured precipitates. These precipitates gives blue colour solution on treatment with HNO3 followed by excess of NH4OH.
