Final answer:
CH₃Cl contains the most polar bond among the given compounds because chlorine is more electronegative than the other atoms it is compared to, resulting in a notable difference in electronegativity between the carbon and chlorine atoms.
Step-by-step explanation:
The student has asked which compound contains the most polar bond among CH₃SH, CH₃OH, CH₃Cl, and CH₃NH₂. Polar bonds are formed due to differences in electronegativity between the bonded atoms. Electronegativity values increase from left to right across the periodic table, and from bottom to top. Therefore, the most polar bond will be the one between atoms with the greatest difference in electronegativity.
CH₃Cl has a bond between carbon and chlorine; chlorine is more electronegative than carbon, sulfur, hydrogen, and nitrogen, which are found in the other given compounds. This makes the C-Cl bond in chloromethane more polar than C-S in CH₃SH, C-O in CH₃OH, and C-N in CH₃NH₂. The answer to the question is CH₃Cl, which contains the most polar bond due to the significant electronegativity difference between carbon and chlorine.