1.

The reagent used to convert an alkyne to alkene is

Answer»

`Zn-Hg//HCl`
`Pd// H_(2)`
`Zn//HCl`
`Sn//HCl`

SOLUTION :Alkynes react READILY with hydrogen in thepresence of finely divided NI , Pt or Pd as catalyst . The reaction is called hydrogenation.
`HC-=CHunderset(pT or Pd)overset(H_(2),Nior)to CH_(2)=CH_(2)`


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