JEE Main 20 July 2021 Shift 1 Solved Paper

Section: Chemistry

Question : 41 of 90

Marks: +1, -0

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:

[20 Jul 2021 Shift 1]

Co(NO3)2
Pb(NO2)2
Cu(NO3)2
Pb(NO3)2

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FeSO4	+	H2SO4	+	NO3−
Soln	‌	conc.	‌	X