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Chrome iron ore (x) was heated with dry ...

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

Text Solution

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The correct Answer is:
A
Basic chromium sulphate is used in leather Tanning
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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. B was obtained by fractional crystallization. The compound crystallized first was

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. Quick lime is added during heating because

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. When alkali is added to B, the species formed is

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. The oxidation state of iron in 'x' is

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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. The oxidation states of chromium in x,A and C are

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. Compound (B) will be

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