Predict the product $\mathrm{C}$ obtained in the following reaction of butyne- 1 : $\mathrm{CH}_3 \mathrm{CH}_2-\mathrm{C} \equiv \mathrm{CH}+\mathrm{HCl} \rightarrow \mathrm{B} \stackrel{\mathrm{HI}}{\longrightarrow} \mathrm{C}$

• A

  
  
• B

  
  
• Correct answer
  C

  
  
• D

  
  

Solution

A Caution According to Markownikoff's rule, when an unsymmetrical alkene undergo hydrohalogenation, the negative part goes to that $C$-atom which contain lesser no. of H-atom.

Hence, the correct answer is option: 'C'.