Which formula can represent an alkyne? * O
1. C2H4
O
2. C2H6
O
3. C3H4
O
4. C3H6

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

The answer is accuracy