The molecule of any compound composed of two dissimilar elements is always polar-justify the statement.

Explanation

The statement is not always true. A diatomic molecule (A-B) consisting of two dissimilar elements of different electronegativities is always polar because there is no Possibility of cancellation of the bond moment. HCl, HF, etc., are examples of such molecules. a poly-atomic molecule with two dissimilar elements may or may not be polar, polarity of such a molecular depends on their geometrical shapes. if the molecule is linear having a structurelike A-B-A (i.e., the individual bond moments cancel out each other), it is on polar and if not, it is polar., the linear `CO_(2)` molecule, for example, is non polar because the two equal and opposite `C overset(harr)(=)O` Bond moments cancel out each other. however, angular `H_(2)O` molecule is polar because the two O-H bond moments do not cancel out each other and there exists a resultant moment.