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Question

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 B CoCl3.3NH3
CoCl3.3NH3 doesn‘t ionize to give free Cl, so it doesn‘t answer the test for chloride ions.

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