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Pamela Kalla
Asked: 2022-11-09T17:58:49+05:30 In:

When sodium carbonate is added in excess to a metal chloride solution followed by the bromine water and then mixture is slightly heated , the solution turns apple green. The metal chloride is `:`
A. `NiCl_(2)`
B. `CoCl_(2)`
C. `CrCl_(2)`
D. `FeCl_(3)`

When sodium carbonate is added in excess to a metal chloride solution followed by the bromine water and then mixture is slightly heated , the solution turns apple green. The metal chloride is `:`
A. `NiCl_(2)`
B. `CoCl_(2)`
C. `CrCl_(2)`
D. `FeCl_(3)`
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1 Answer

  1. Correct Answer – B
    `CoCl_(2)+2NaHCO_(3)rarrCo(HCO_(3))_(2)+2NaCl`
    `CO(HCO_(3))_(2)+4NaHCO_(3)rarrNa_(4)[Co(CO_(3))_(3)]+3H_(2)O+3CO_(2)`
    `Br_(2)+H_(2)Orarr2HBr+[O]`
    `2Na_(4)[Co(OC_(3))_(3)]+H_(2)O+[O]rarr2Na_(3)[Co(CO_(3))_(3)](“green”)+2NaOH`

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