PG entrance exam CUET PG 2025 Mock Test Chemical Sciences Transition Elements and Inner Transition Elements
When chromite ore (A) is fused with sodium carbonate in excess of air and the product is dissolved in water, a yellow solution of compound (B) is obtained. On treating B with sulphuric acid, compound (C) can be crystallized from the solution. When compound (C) is treated with KCl, orange crystals of compound (D) crystallise out. Identify A and D.
1
PbCrO4, K2CrO4
2
PbCrO4, K2Cr2O7
3
FeCr2O4, K2CrO4
4
FeCr2O4, K2Cr2O7