NEET Questions Solved


Which is the most suitable reagent among the following to distinguish compound (III) from rest of the compounds?                                                                                                 

I. CH3-CC-CH3

II. CH3-CH2-CH2-CH3

III. CH3-CH2-CCH

IV. CH3-CH=CH2

(a) Br2/CCl4                     (b) Br2/CH3COOH

(c)Alk.KMnO4                   (d) Ammonical AgNO3

(d) It may be noted that only the terminal alkynes react with ammonical silver nitrate. Therefore, this reaction can be used to distinguish between 1-alkynes and others such as alkane, alkenes and non-terminal alkynes.

     CH3-CH2-CCH + 2[Ag(NH3)2]NO3 CH3CH2CCAg

                                                                         white ppt.

Difficulty Level:

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