See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

D is wrong other statements are correct This ore is 2 4 FeCr O and it is the prep. Of 2 2 7 K Cr O in figure 2 4 2 2 3 2 4 2 3 2 FeCr O +O +Na CO Na CrO (yellow)+Fe O +CO  after acidification we have 2 7 2 2 4 2 NaCr O .2H Oand Na SO .10H O AITS-FT-VII (Paper-1)-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 12 Mathematics PART – III SECTION – A