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Chrome iron ore (x) was heated with dry `Na_(2)CO_(3)` in the presence of quick lime and air in a furnace. The mixture was extracted with water and filtered. The filtrate was yellow(A) which on adding conc. `H_(2)SO_(4)` turned to orange red. The solution was evaporated and cooled. The crystals of B were obtained. To the crystals in aqueous solution, `NH_(4)Cl` was added. On fractional crystallization, orange red crystals (C ) is formed.
A is used in the
A. Leather Tanning
B. flux
C. water softner
D. sizing agent

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1 Answer

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by (83.1k points)
Correct Answer - A
Basic chromium sulphate is used in leather Tanning

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