Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?       

1. NaNH₂

2. HCl

3. O₂

4. Br₂

Mark the compound that, when treated with NaNH₂, forms its sodium salt:

A compound that is formed on passing chlorine through propene at 400$°$C is -

1. PVC                       

 2. Allyl chloride  

3. Nickel chloride         

4. 1,2-Dichloro ethane

In the following reaction,

Product A is-

1. 

2. 

3. 

4. 

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