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.
‘X’ is
- ZnO
- ZnSO4 . 7H2O
- Cu2Cl2
- ZnCO3
Answer
(D) ZnCO 3
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