Identify the correct statement(s) of the following: (A) The mineral kionite (Ca2Cu2Si3O10.2H2O) is a chain silicate. (B) HF is used as etching agent in glass industry. (C) In the titration of Fe3+ wit

Question

Identify the correct statement(s) of the following:
(A) The mineral kionite (Ca2Cu2Si3O10.2H2O) is a chain silicate.
(B) HF is used as etching agent in glass industry.
(C) In the titration of Fe3+ with Sn2+, KCNS can be used as a suitable indicator.
(D) On reaction of red lead with conc. HCl, a golden yellow gas is evolved.

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. (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      AITS-OT (Paper-2)-PCM(Sol.)-JEE(Advanced)/20 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 13

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