On addition of HBr to propene in the absence of peroxides, the first step involves the addition of:

1. H⁺

2. Br^-

3. H

4. Br

When ethyl bromide and n-propyl bromide is allowed
to react with sodium, in ether, they form

(1) mixture of four alkanes

(2) mixture of three alkanes

(3) mixture of two alkanes

(4) single alkane

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

Which compound among the following has the highest boiling point?

 [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 ${\mathrm{NaNH}}_2$

Benzene reacts with ${\mathrm{CH}}_3\mathrm{COCl}$ in the presence of anhydrous ${\mathrm{AlCl}}_3$ to give:

1. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3$

2. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Cl}$

3. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{O}}_{\mathrm{}}$Cl

4. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COCH}}_3$

Acidic hydrogen present among the following compound is -

1. Ethyne

2. Ethene

3. Benzene

4. Ethane

What will be the Product in the following reaction?

1. 

2. 

3. 

4.  

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-