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Question

Consider the following compounds and distinguishing tests. List–I contains compounds for the test and List–II contains test which distinguish the given pair of compounds.


Which of the following option has correct combination considering List–I and List–II?

A
(I) - (Q), (S)
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B
(I) - (Q)
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C
(I) - (P)
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D
(III) - (R)
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Solution

The correct option is C (I) - (P)
(I) Both are secondary alcohols so can not be differentiated by Lucas test. OH|CCH3 gives positive iodoform test.
Hence these can be differentiated by iodoform test.
IP

(II) First compound gives white ppt of AgCl with aq. AgNO3. Second compound gives positives Lucas test.
IIQ,S

(III) Phenol being weakly acidic does not react with sodium bicarbonate while carboxylic acid releases CO2 on reaction with NaHCO3.
IIIT

(IV) These can be differentiated through isocyanide test. Only primary amines respond positively to this test.
IVR

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