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Question

A complex compound of cobalt has molecular formula containing five NH3 molecules, one NO2 group and two Cl atoms for one Co atom. One mole of this compound produces three moles of ions in aqueous solution. On reacting with an excess of AgNO3 solution, two moles of AgCl get precipitated. The ionic formula of the compound is:

A
[Co(NH3)4NO2Cl] [(NH3)Cl]
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B
[Co(NH3)5Cl] [Cl(NO2)]
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C
[Co(NH3)5(NO2)]Cl2
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D
[Co(NH3)5][(NO2)Cl3]
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Solution

The correct option is D [Co(NH3)5(NO2)]Cl2
The ionic formula of the compound is [Co(NH3)5(NO2)]Cl2.

[Co(NH3)5(NO2)]Cl2[Co(NH3)5(NO2)]++2Cl

Total 3 ions are produced in aqueous solution.

Hence, the correct option is C

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