ICSE

CHEMISTRY · Single correct · ICSE · Chemistry · Study of the First Element – Hydrogen · Study of the First Element – Hydrogen

Problem

(X)(Black)→dil. H2SO4(Y)(gas)→dil. HNO3Colloidal sulphur; Identify (X):(X) (\text{Black}) \xrightarrow{\text{dil. } H_2SO_4} (Y) (\text{gas}) \xrightarrow{\text{dil. } HNO_3} \text{Colloidal sulphur}; \text{ Identify } (X): (1) CuSCuS (2) FeSFeS (3) PbSPbS (4) NiSNiS

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