See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

(for Q. 28 and 29):             Sulphur excess of HCl 2 2 ZnO X ZnS P H S R ZnCl S Philosopher's wool White substance Foul smell gas Solution     Aq. NaOH     2 Zn OH T white ppt. 2 2 Na ZnO  2 SO Q  Excess of NaOH Sol. 28. (A) ZnO – is an amphoteric oxide. (B) ZnO is white powder which on heating turns yellow but again on cooling becomes white. (C) Lithopone is mixture of 4 ZnS BaSO  (D) 2 ZnO CoO CoZnO or CoO.ZnO Rinmann's green   AITS-FT-X (Paper-2)-PCM(Sol.)-JEE(Advanced)/22 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 7 Sol. 29. 3 AgNO    4 KMnO Acidic    3 2 CH COO Pb    3 2 CH COO Cd    2 Ag S Black  2 4 4 2 K SO MnSO S H O      PbS Black    CdS Yellow  2 H S Section – B