See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

(A) 8 | | | | | | O O O O O O O Si O Si O Si O                  (B) HF reacts with glass, so it is used to make marking on the glass (etching). (C) Since Fe3+ reacts with KCNS to produce red colour. So, it can be used as an indicator in the titration of Fe3+ with Sn2+. (D)   3 4 2 2 2 Greenish yellow Pb O HCl PbCl H O Cl     