If metal ions of group III are precipitated by NH4 Cl and NH4 OH without prior oxidation by conc. HNO3.........is not completely precipitated.

Question

If metal ions of group III are precipitated by NH4 Cl and NH4 OH without prior oxidation by conc. HNO3.........is not completely precipitated. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Heating chloride salt with K2 Cr2 O7 in conc. H2 SO4 gives off a deep vapour of chromyl chloride (CrO2 Cl2).

Q. If metal ions of group III are precipitated by $N H_{4} Cl$ and $N H_{4} O H$ without prior oxidation by conc. $H N O_{3}$ .........is not completely precipitated.

Heating chloride salt with $K_{2} C r_{2} O_{7}$ in conc. $H_{2} S O_{4}$ gives off a deep vapour of chromyl chloride $(C r O_{2} C l_{2}) .$

Q. If metal ions of group III are precipitated by NH4​Cl and NH4​OH without prior oxidation by conc. HNO3​.........is not completely precipitated.

Heating chloride salt with K2​Cr2​O7​ in conc. H2​SO4​ gives off a deep vapour of chromyl chloride (CrO2​Cl2​).

Q. If metal ions of group III are precipitated by $N H_{4} Cl$ and $N H_{4} O H$ without prior oxidation by conc. $H N O_{3}$ .........is not completely precipitated.

Heating chloride salt with $K_{2} C r_{2} O_{7}$ in conc. $H_{2} S O_{4}$ gives off a deep vapour of chromyl chloride $(C r O_{2} C l_{2}) .$