230351 The formation of 2-butene as a major product by dehydration of 2-butanol is in accordance with

230366 3-Phenylpropene on reaction with $\mathrm{HBr}$ gives (as a major product) :

230357 In the reaction, $\mathrm{Ph}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$ $\stackrel{{\mathrm{NaNH}}_3}{⟶}\mathrm{A}\stackrel{{\mathrm{Cl}}_2/\mathrm{hr}}{⟶}\mathrm{B},\mathrm{B}$ is

1

2

3 $\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CH}(\mathrm{Cl})-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

4 None of these

230351 The formation of 2-butene as a major product by dehydration of 2-butanol is in accordance with

230366 3-Phenylpropene on reaction with $\mathrm{HBr}$ gives (as a major product) :

230357 In the reaction, $\mathrm{Ph}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$ $\stackrel{{\mathrm{NaNH}}_3}{⟶}\mathrm{A}\stackrel{{\mathrm{Cl}}_2/\mathrm{hr}}{⟶}\mathrm{B},\mathrm{B}$ is

1

2

3 $\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CH}(\mathrm{Cl})-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

4 None of these

230387 In which of the below reaction do we find $\alpha ,\beta -$ unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?

230351 The formation of 2-butene as a major product by dehydration of 2-butanol is in accordance with

230366 3-Phenylpropene on reaction with $\mathrm{HBr}$ gives (as a major product) :

230357 In the reaction, $\mathrm{Ph}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$ $\stackrel{{\mathrm{NaNH}}_3}{⟶}\mathrm{A}\stackrel{{\mathrm{Cl}}_2/\mathrm{hr}}{⟶}\mathrm{B},\mathrm{B}$ is

1

2

3 $\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CH}(\mathrm{Cl})-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

4 None of these

230387 In which of the below reaction do we find $\alpha ,\beta -$ unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?

230351 The formation of 2-butene as a major product by dehydration of 2-butanol is in accordance with

230366 3-Phenylpropene on reaction with $\mathrm{HBr}$ gives (as a major product) :

230357 In the reaction, $\mathrm{Ph}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$ $\stackrel{{\mathrm{NaNH}}_3}{⟶}\mathrm{A}\stackrel{{\mathrm{Cl}}_2/\mathrm{hr}}{⟶}\mathrm{B},\mathrm{B}$ is

1

2

3 $\mathrm{Ph}-{\mathrm{CH}}_2-\mathrm{CH}(\mathrm{Cl})-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

4 None of these

230387 In which of the below reaction do we find $\alpha ,\beta -$ unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?