Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25∘C ?
A
CoCl3.6NH3
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B
CoCl3.3NH3
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C
CoCl3.4NH3
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D
CoCl3.5NH3
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Solution
The correct option is BCoCl3.3NH3 CoCl3.3NH3 doesn‘t ionize to give free Cl−, so it doesn‘t answer the test for chloride ions.