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JEE Main 202116 MarchEvening Shift
Exam
JEE Main
Year
2021
Date
16 March
Shift
Evening Shift
Subject
Chemistry
Chapter
Hydrocarbons

JEE Main 2021 · 16 March · Evening Shift · Chemistry · Hydrocarbons

An unsaturated hydrocarbon X on ozonolysis gives A . Compound A...

An unsaturated hydrocarbon XX on ozonolysis gives AA. Compound AA when warmed with ammoniacal silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon XX is :An unsaturated hydrocarbon X on ozonolysis gives A . Compound A when warmed with ammoniacal silver nitrate forms aAn unsaturated hydrocarbon X on ozonolysis gives A . Compound A when warmed with ammoniacal silver nitrate forms aAn unsaturated hydrocarbon X on ozonolysis gives A . Compound A when warmed with ammoniacal silver nitrate forms aAn unsaturated hydrocarbon X on ozonolysis gives A . Compound A when warmed with ammoniacal silver nitrate forms a

Options

  1. AFour of the following five are alike in a certain way and so form a group. Which is the one that does not belong to
  2. BFour of the following five are alike in a certain way and so form a group. Which is the one that does not belong to
  3. CHC≡C−CH2−CH3HC ≡ C - {CH}_{2} - {CH}_{3}
  4. DCH3−C≡C−CH3{CH}_{3} - C ≡ C - {CH}_{3}

Correct answer

C. HC≡C−CH2−CH3HC ≡ C - {CH}_{2} - {CH}_{3}

Step-by-step solution

An unsaturated hydrocarbon X on ozonolysis gives A . Compound A when warmed with ammoniacal silver nitrate forms a

As (A)( A ) compound given positive Tollen's test hence it may consist −CHO- CHO (aldehyde group) or it can be HCOOHHCOOH

So for the given option :

(3) CH3−CH2−C≡CH⟶OzonolysisCH3CH2COOH+HCOOH(A)+vetollen′stest{CH}_{3} - {CH}_{2} - C ≡ CH\overset{Ozonolysis}{⟶}{CH}_{3}{CH}_{2}COOH + \mathop{HCOOH}_{\mathop{( A )}_{+ vetollen ' stest}}

and for other compounds (options):

An unsaturated hydrocarbon X on ozonolysis gives A . Compound A when warmed with ammoniacal silver nitrate forms a

(3) CH3−C≡C−CH3⟶Ozonolysis2CH3−COOH(Doesnotshowtollen′stest){CH}_{3} - C ≡ C - {CH}_{3}\overset{Ozonolysis}{⟶}\mathop{2{CH}_{3} - COOH}_{( Doesnotshowtollen ' stest )}

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