An organic molecule necessarily shows optical activity if it -

1. Contains asymmetric carbon atoms

2. Is non-planar

3. Is non-superimposable on its mirror image

4. Is superimposable on its mirror image

The compound that has least hindered rotation around carbon-carbon bond is-

A compound having the highest boiling point among the following is - 

 [A] and [B]  in the  mentioned reaction are respectively -

1. Alc. KOH and ${\mathrm{NaNH}}_2$

2. ${\mathrm{NaNH}}_2$ and Lindlar catalyst

3. ${\mathrm{NaNH}}_2$ and alcoholic KOH

4. Lindlar catalyst and ${\mathrm{NaNH}}_2$

Acidic hydrogen present among the following compound is -

1. Ethyne

2. Ethene

3. Benzene

4. Ethane

Which of the following compounds is insoluble even in hot concentrated H₂​SO₄​?

1. Aniline 

2. Benzene

3. Ethylene

4. Hexane

Anti-Markovnikov’s addition of HBr is not observed in-

Baeyer's reagent is: 

1. Acidified permanganate solution

2. Alkaline permanganate solution

3. Neutral permanganate solution

4. Aqueous bromine solution

Consider the following reaction,

The structure of the major reaction intermediate formed in the above reaction is-

 1-Butyne and 2-Butyne can be differentiated by -

1. Bromine, CCl₄

2. H₂ , Lindlar catalyst

3. Dilute H₂SO₄, HgSO₄ 

4. Ammoniacal cuprous chloride