1.

How will you test pure chloroform?

Answer»

Solution :CHLOROFORM is oxidised by air in PRESENCE of light to form poisonous gas phosgene and HCl as shown in previous Q.
When aq. `AgNO_(3)` solution is ADDED to the above solution, a white ppt. of AgCl is formed.
`COCl_(2)+H_(2)Oto CO_(2)+2HCl`
`HCl+AgNO_(3)to underset("White ppt.")(AgCl)+HNO_(3)`
The formation of white ppt. confirms that chloroform is impure. if, however, no white ppt. is formed, it confirms that chloroform is pure.


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