The systematic name for CH3CH2C=CH2
CH?
a) 3-methylbutane
b) O2-methylbutane
c) 02-metrybut-1-ene
d) 3-methylbutiene

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