3-Hexyne can be converted to trans-3-Hexene by the action of:

1. ${\mathrm{H}}_2$ - Pd/ ${\mathrm{BaSO}}_4$                       

2. Li-Liq. ${\mathrm{NH}}_3$

3. ${\mathrm{H}}_2$ - Pt ${\mathrm{O}}_2$                               

4. ${\mathrm{NaBH}}_4$

A compound having the shortest carbon-carbon bond length among the following is :

1. Benzene                                 

2. Ethene

3. Ethyne                                   

4. Ethane

Reaction of HBr with propene in the presence of peroxide gives

1. iso-propyl bromide

2. 3-bromo propane

3. allyl bromide

4. n-propyl bromide

In the reaction, ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3\stackrel{\mathrm{Oxidation}}{\to }$A $\stackrel{\mathrm{NaOH}}{\to }$B$\underset{∆}{\overset{\mathrm{Soda} \mathrm{lime}}{\to }}$C 

the product C is:

1. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{OH}$ 

2. ${\mathrm{C}}_6{\mathrm{H}}_6$

3. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COONa}$

4. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{ONa}$

The compound formed when acetylene is passed through dilute sulphuric acid in the presence of mercury(II) sulphate is:

1. Ether

2. Ketone

3. Acetic acid

4. Acetaldehyde

Why are acetylenic hydrogens acidic?

A compound is treated with ${\mathrm{NaNH}}_2$ to give sodium salt. Identify the compound.

1. ${\mathrm{C}}_2{\mathrm{H}}_2$ 

2. ${\mathrm{C}}_6{\mathrm{H}}_6$

3. ${\mathrm{C}}_2{\mathrm{H}}_6$ 

4. ${\mathrm{C}}_2{\mathrm{H}}_4$

Which alkene on ozonolysis gives ${}_{}$
 \(CH_3CH_2CHO\) and  \(CH_3CCH_3\\ ~~~~~~~~||\\ ~~~~~~~~O\) 

1.

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CHCH}}_2{\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CHCH}}_3$

4. 

Hydroxylation of propyne in the presence of ${\mathrm{HgSO}}_4/{\mathrm{H}}_2{\mathrm{SO}}_4$ is initiated by the attack of:

1. carbene 

2. free radical

3. electrophile

4. nucleophile

Which products are obtained from the ozonolysis of buta-1,3-diene?

1. Formaldehyde and glyoxal  
2. Acetaldehyde and glyoxal  
3. Carbon dioxide and glyoxal  
4. Formaldehyde, glyoxal, and acetaldehyde