Question

Consider the following compounds in the liquid form:
$O _{2}, HF , H _{2} O , NH _{3}, H _{2} O _{2}, CCl _{4}, CHCl _{3}, C _{6} H _{6}, C _{6} H _{5} Cl$
When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?

Answer 1

Only polar molecules can be attracted by a charged comb. So, except O2, CCl4 and C6H6 all can be attracted in electric field.
Polar molecules: HF, H2O, NH3, H2O2, CHCl3, C6H5Cl

Non-polar molecules: O2, CCl4, Benzene