Which of the following would not be defined as an acid a. koh, b. hno3, d. h3po4 and why

B. HNO3 because it is copper and can not move the place of hydrogen's atom from the acid

D. most models represent a real world object in a simpler way

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