For ten points, name these organic compounds with form "C-sub-n H-sub-2n-minus-2", whose simplest example is acetylene.
Typically very nucleophilic, they are non-polar and insoluble in water and can form nitriles when combined with ammonia.  The disubstituted variety of these compounds is   termed "internal", while monosubstituted ones are dubbed "terminal".  They obey Markovnikov's rule, and often undergo reactions in which their two pi bonds are changed to sigma bonds, an effect of Lindlar's catalyst.  For ten points, name these organic compounds with form "C-sub-n H-sub-2n-minus-2", whose simplest example is acetylene.
Typically very nucleophilic, they are non-polar and insoluble in water and can form nitriles when combined with ammonia.  
{Alkynes}