A white substance ‘X’ when heated in a test tube, it produces a colourless, odourless…
Chemistry · JEE Advanced · NTA Exams — d- and f-Block Elements
A white substance ‘X’ when heated in a test tube, it produces a colourless, odourless gas, leaving a residue, yellow when hot and white when cold. The residue was dissolved in dil. HCl, made alkaline with NH4Cl and NH4OH and H2S gas was passed through it. A white. ppt ‘Y’ was formed. It was dissolved in dil. HCl to give ‘Z’ which on treatment with K4[Fe(CN)6] gave bluish white precipitate.
‘Y’ and ‘Z’ are respectively
- ZnO, ZnSO4
- ZnS, ZnCl2
- ZnCl2 Zn(OH)2
- ZnO, ZnS
Answer
(B) ZnS, ZnCl 2
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