A sample of chloroform before being used as an anaesthetic agent is tested by

Febling's solution

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Ammonical cuprous chloride

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Silver nitrate solution in the cold

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Silver nitrate solution after boiling with alcoholic KOH

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Solution

The correct option is C
Silver nitrate solution in the cold

If CHCl₃ sample contains phosgene (COCl₂ ) then it will give a white ppt. When treated with

AgNO₃ solution in the cold.

However, after boiling CHCl₃ with alcoholic KOH , the resulting solution will always give white ppt.

with AgNO₃solution whether it contains( COCl₂ ) or not.

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