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, $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$ $\stackrel{\mathrm{NaNH}_3}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Cl}_2 / \mathrm{hr}}{\longrightarrow} \mathrm{B}, \mathrm{B}$ 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, $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$ $\stackrel{\mathrm{NaNH}_3}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Cl}_2 / \mathrm{hr}}{\longrightarrow} \mathrm{B}, \mathrm{B}$ 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, $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$ $\stackrel{\mathrm{NaNH}_3}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Cl}_2 / \mathrm{hr}}{\longrightarrow} \mathrm{B}, \mathrm{B}$ 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, $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$ $\stackrel{\mathrm{NaNH}_3}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Cl}_2 / \mathrm{hr}}{\longrightarrow} \mathrm{B}, \mathrm{B}$ 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?