Alkynes — Prelims Questions

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

Propyne on hydration in the presence of $HgSO_4$ and $H_2SO_4$ yields:

Which of the following reactions will yield *trans*-2-butene?

Which of the following compounds will react with ammoniacal cuprous chloride solution to give a red precipitate?

What is the major product when 1-butyne reacts with HBr in the presence of peroxides?

Which of the following statements about the acidity of hydrocarbons is correct?