whats the advantages and disadvantages when we do this practical: Effect of Carbon Atoms Number in Alcohol on Combustion.

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   

You can look it up online and some images should pop up 

Ans(15) minutes;

The answer will be +250